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Revenue and Contract Balances (Schedule of Total Revenue From Customers By Geographic Region) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 52,587	$ 37,205
United States [Member]
Disaggregation of Revenue [Line Items]
Total revenue	48,987	34,298
Rest of World [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,600	$ 2,907

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

Commitments and Contingencies

3 Months Ended

Mar. 31, 2026

Commitments and Contingencies [Abstract]

Commitments and Contingencies

7. Commitments and Contingencies

Royalty Commitments

The Company has entered into various exclusive technology licensing agreements and other software licensing agreements. The terms of the agreements require the Company to make annual royalty payments in fixed amounts as well as certain milestone and revenue-based payments. The revenue-based royalty percentage is in the low single digits, subject to reductions and offsets in certain circumstances with a minimum royalty commitment of $50,000 annually. Future minimum royalty commitments due under the terms of these exclusive agreements as of March 31, 2026 are as follows (in thousands):


Year Ending December 31:	Amount
2026	$	—
2027		50
2028		50
2029		50
2030		50
Thereafter		50
	$	250

The Company incurred royalty expense of $568,000 and $414,000 within cost of revenue on the condensed consolidated statements of operations and comprehensive loss for the three months ended March 31, 2026 and 2025, respectively.

Purchase Commitments

Open purchase commitments consist of agreements to purchase goods and services that are entered into in the ordinary course of business. These amounts were not recorded as liabilities on the condensed consolidated balance sheets as of March 31, 2026 and December 31, 2025 as the Company had not yet received the related goods or services. As of March 31, 2026 , the Company had estimated open purchase commitments for goods and services of $6.0 million over the next three years.

Contingencies

The Company is not involved in any pending legal proceedings that it believes could have a material adverse effect on its financial condition, results of operations or cash flows, except as discussed below. The Company may pursue or be subject to litigation and other legal actions from time to time arising in the ordinary course of business, including intellectual property, products liability, breach of contract, commercial, employment, and other similar claims which could have an adverse impact on its reputation, business and financial condition and divert the attention of its management from the operation of its business. The Company discloses information regarding each material claim where the likelihood of a loss contingency is probable or reasonably possible and accrues a liability for such matters when it is probable that a loss may be incurred, and such losses can be reasonably estimated. There were no contingent liabilities requiring accrual or disclosures as of March 31, 2026 and December 31, 2025.

Civil Investigative Demand Investigation

In October 2025, the Company and certain of its employees received civil investigative demands (the “CID”) from the U.S. Department of Justice, Civil Division, in connection with an investigation under the federal Anti-Kickback Statute and Civil False Claims Act (the “Investigation”). The CID requests information, documents, and testimony focused on the Company’s financial and contractual arrangements with providers and its sales and marketing activities. The Company is cooperating with the Investigation and is unable to express a view at this time regarding the likely duration, or ultimate outcome, of the Investigation or estimate the possibility of, or amount or range of, any possible financial impact. Depending on the outcome of the Investigation, there may be a material impact on the Company’s business, results of operations, financial condition, or cash flows.

Indemnifications

The Company provides general indemnifications to management and the members of the Board of Directors when they act, in good faith, in the best interest of the Company. The Company is unable to develop an estimate of the maximum potential amount of future payments that could potentially result from any hypothetical future claim but expects the risk of having to make any payments under these general business indemnifications to be remote. The Company also maintains insurance coverage that would generally enable the Company to recover a portion of any future amounts paid.

Derivative Liability (Narrative) (Details) - USD ($) $ in Millions	Aug. 11, 2025	Mar. 31, 2025	Mar. 26, 2025	Jan. 31, 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability	$ 24.6		$ 20.8	$ 11.1
Conversion price, discount percentage	20.00%
2025 Convertible Notes [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability		$ 20.8		$ 11.1
Conversion price, discount percentage	20.00%

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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+ Details

Stock-Based Compensation Plans (Summary of Estimated Fair Value of Stock Options) (Details)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Options to Purchase Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected life (in years)	6 years	6 years
Expected volatility minimum		55.00%
Expected volatility maximum		55.40%
Expected volatility	57.10%
Risk-free interest rate	3.90%	4.00%
ESPP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected life (in years)	6 months
Expected volatility	55.10%
Risk-free interest rate	3.70%

- Definition

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+ Details

Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2026

Net Loss Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted



	Three Months Ended
	March 31,
	2026		2025
Numerator:
Net loss	$	(27,380)	$	(32,345)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted		85,639,675		6,164,617
Net loss per share, basic and diluted	$	(0.32)	$	(5.25)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share



	March 31,
	2026	2025
Redeemable convertible preferred stock	—	122,231,454
Outstanding options to purchase common stock	10,227,211	8,583,703
Restricted stock units	1,840,421	—
Estimated ESPP	141,184	—
Common stock warrants	—	1,647,667
	12,208,816	132,462,824

Summary of Significant Accounting Policies (Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Summary of Significant Accounting Policies [Abstract]
Cash and cash equivalents	$ 19,671	$ 44,776	$ 109,786
Restricted cash	4,702	4,709	4,475
Total cash, cash equivalents and restricted cash	$ 24,373	$ 49,485	$ 114,261	$ 55,842

Term Loan (2024 Credit Agreement) (Details) - USD ($) $ in Millions	Jan. 24, 2025	Jun. 14, 2024
2024 Credit Agreement [Member]
Debt Instrument [Line Items]
Notes payable		$ 138.1
2025 Convertible Notes [Member]
Debt Instrument [Line Items]
Notes converted	$ 23.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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+ Details

Common Stock Warrant Liability (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Oct. 22, 2025	Mar. 31, 2025	Dec. 31, 2025	Mar. 31, 2026
Class of Warrant or Right [Line Items]
Number of warrants issued to purchase (in shares)			0	0
Change in fair value of common stock warrant liability		$ 1,606	$ 43,900
Common Stock Warrant [Member]
Class of Warrant or Right [Line Items]
Shares issued	1,646,317
Warrant value reclassified to stockholders' equity	$ 64,700

Leases (Schedule of Aggregate Lease Payments) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Operating Leases:
2026	$ 5,044
2027	6,846
2028	7,066
2029	6,811
2030	5,150
2031 and after	696
Total minimum lease payments	31,613
Less: Amount of lease payments representing interest	5,264
Present value of future minimum lease payments	26,349
Less: Current lease liabilities	6,382	$ 5,922
Long-term lease liabilities	$ 19,967	$ 16,132

Balance Sheet Components (Schedule of Allowance for Credit Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 626	$ 814
Additions
Write-offs		(188)
Ending balance	$ 626	$ 626

Balance Sheet Components (Summary of Available-for-sale Investments and Restricted Cash) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	$ 241,641	$ 267,736
Gross Unrealized Gains	1	169
Gross Unrealized Losses	(365)	(15)
Cash equivalents	1,348	27,806
Short-term investments	138,645	132,010
Long-term investments	96,582	103,365
Restricted cash	4,702	4,709	$ 4,475
Estimated Fair Value	241,277	267,890
Money Market Funds Included In Cash Equivalents [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	1,348	27,806
Estimated Fair Value	1,348	27,806
Money Market Funds Included In Restricted Cash, Noncurrent [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	4,702	4,709
Estimated Fair Value	4,702	4,709
U.S. Government Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	81,500	81,385
Gross Unrealized Gains		94
Gross Unrealized Losses	(78)
Estimated Fair Value	81,422	81,479
U.S. Treasury Bills [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	19,864	39,568
Gross Unrealized Gains	1	25
Estimated Fair Value	19,865	39,593
Corporate Bonds/Notes [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	63,517	57,564
Gross Unrealized Gains		19
Gross Unrealized Losses	(153)	(12)
Estimated Fair Value	63,364	57,571
Agency Bonds/Notes [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	44,137	25,147
Gross Unrealized Gains		7
Gross Unrealized Losses	(108)	(3)
Estimated Fair Value	44,029	25,151
Asset-Backed Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	21,638	21,689
Gross Unrealized Gains		22
Gross Unrealized Losses	(25)
Estimated Fair Value	21,613	21,711
Commercial Paper [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	4,935	9,868
Gross Unrealized Gains		2
Gross Unrealized Losses	(1)
Estimated Fair Value	$ 4,934	$ 9,870

Balance Sheet Components (Schedule of Available-for-sale Investments in an Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, fair value	$ 1,415	$ 30,711
Less than 12 months, unrealized loss	(365)	(15)
U.S. Government Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, fair value	566
Less than 12 months, unrealized loss	(78)
Corporate Bonds/Notes [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, fair value	413	26,716
Less than 12 months, unrealized loss	(153)	(12)
Agency Bonds/Notes [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, fair value	389	3,995
Less than 12 months, unrealized loss	(108)	$ (3)
Asset-Backed Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, fair value	47
Less than 12 months, unrealized loss	(25)
Commercial Paper [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, unrealized loss	$ (1)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Section 50
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-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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+ Details

Net Loss Per Share

3 Months Ended

Mar. 31, 2026

Net Loss Per Share [Abstract]

Net Loss Per Share

16. Net Loss Per Share

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except share and per share amounts):



	Three Months Ended
	March 31,
	2026		2025
Numerator:
Net loss	$	(27,380)	$	(32,345)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted		85,639,675		6,164,617
Net loss per share, basic and diluted	$	(0.32)	$	(5.25)

The following outstanding shares of potentially dilutive securities were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive:



	March 31,
	2026	2025
Redeemable convertible preferred stock	—	122,231,454
Outstanding options to purchase common stock	10,227,211	8,583,703
Restricted stock units	1,840,421	—
Estimated ESPP	141,184	—
Common stock warrants	—	1,647,667
	12,208,816	132,462,824

Stock-Based Compensation Plans (Schedule of Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 6,554	$ 2,492
Cost of Revenue [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	166	57
Research and Development [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	2,138	547
Selling, General and Administrative [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 4,250	$ 1,888

Balance Sheet Components (Summary of Fair Value of Cash Equivalents and Available-for-sale Investments Classified by Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Components [Abstract]
Amounts maturing within one year	$ 139,993	$ 159,816
Amounts maturing after one year through two years	96,582	103,365
Total	$ 236,575	$ 263,181

Commitment and Contingencies (Tables)

3 Months Ended

Mar. 31, 2026

Commitments and Contingencies [Abstract]

Schedule of Future Minimum Royalty Commitments


Year Ending December 31:	Amount
2026	$	—
2027		50
2028		50
2029		50
2030		50
Thereafter		50
	$	250

Summary of Significant Accounting Policies (Schedule of Significant Expense Categories of Reporting Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Summary of Significant Accounting Policies [Abstract]
Revenue	$ 52,587	$ 37,205
Less :
Cost of revenue	10,423	9,264
Research and development	21,620	13,924
Selling, general and administrative expenses:
Sales and marketing	29,956	21,635
General and administrative	12,610	9,884
Asset impairment charge	7,482
Loss from operations	(29,504)	(17,502)
Other income (expense), net	2,147	(14,843)
Provision for income taxes	(23)
Net loss	$ (27,380)	$ (32,345)

Summary of Significant Accounting Policies (Narrative) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2026 USD ($) segment customer	Mar. 31, 2025 USD ($) customer	Dec. 31, 2025 customer
Accounting Policies [Line Items]
Number of reportable segments \| segment	1
Number of operating segments \| segment	1
Available for sale securities, credit loss expense	$ 0
Available for sale securities, unrealized gain (loss)	0
Investments		$ 0
Impairment of long-lived assets	$ 7,500,000	0
Revenue, customer contract period (in days)	30 days
Foreign exchange transaction (losses)	$ (418,000)	(357,000)
Foreign currency translation gain (loss)	$ 262,000	$ (236,000)
Options to Purchase Common Stock [Member]
Accounting Policies [Line Items]
Applicable service period (in years)	4 years
Implementation and Onboarding Costs [Member]
Accounting Policies [Line Items]
Capitalized contract cost, amortization period (in years)	2 years
New Site Commission Costs [Member]
Accounting Policies [Line Items]
Capitalized contract cost, amortization period (in years)	3 years
No Customer [Member] \| Customer Concentration Risk [Member] \| Revenue Benchmark [Member]
Accounting Policies [Line Items]
Number of major customers \| customer	0	0
No Customer [Member] \| Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Accounting Policies [Line Items]
Number of major customers \| customer	0		0

Fair Value Measurement (Schedule of Significant Unobservable Inputs (Level 3) and the Change in Fair Value) (Details) - Level 3 [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)
Common Stock Warrant Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	$ 20,835
Change in fair value	43,894
Derecognition/reclassification	(64,729)
Fair value, ending balance
Convertible Notes Derivative Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance
Recognition of derivative liability related to Convertible Notes	31,900
Change in fair value	(7,311)
Derecognition/reclassification	(24,589)
Fair value, ending balance

Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Condensed Consolidated Statements of Operations and Comprehensive Loss [Abstract]
Revenue	$ 52,587	$ 37,205
Cost of revenue	10,423	9,264
Gross profit	42,164	27,941
Operating expenses:
Research and development	21,620	13,924
Selling, general and administrative	42,566	31,519
Asset impairment charge	7,482
Total operating expenses	71,668	45,443
Loss from operations	(29,504)	(17,502)
Interest income	2,464	543
Interest expense	(3)	(5,093)
Change in fair value of common stock warrant liability		(1,606)
Change in fair value of derivative liability		(9,045)
Other income (expense), net	(314)	358
Loss before provision for income taxes	(27,357)	(32,345)
Provision for income taxes	(23)
Net loss	(27,380)	(32,345)
Comprehensive loss:
Net loss	(27,380)	(32,345)
Other comprehensive loss:
Foreign currency translation gain (loss)	262	(236)
Unrealized loss on investments, net	(522)
Total comprehensive loss	$ (27,640)	$ (32,581)
Net loss per share, basic	$ (0.32)	$ (5.25)
Net loss per share, diluted	$ (0.32)	$ (5.25)
Weighted-average shares used to compute net loss per share, basic	85,639,675	6,164,617
Weighted-average shares used to compute net loss per share, diluted	85,639,675	6,164,617

Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2026

Stockholders' Equity [Abstract]

Schedule of Common Stock Reserve for Issuance on Converted Basis



	March 31,	December 31,
	2026	2025
Options to purchase common stock	10,227,211	10,003,254
Restricted stock units	1,840,421	907,703
Shares reserved for issuance under the Company's equity plans	11,648,505	14,085,870
Total	23,716,137	24,996,827

Stock-Based Compensation Plans (Schedule of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Number of Options
Beginning balance (in shares)	10,003,254
Options granted (in shares)	913,696
Options exercised (in shares)	(592,387)
Options forfeited (in shares)	(97,352)
Ending balance (in shares)	10,227,211	10,003,254
Vested and exercisable (in shares)	4,405,075
Vested and expected to vest (in shares)	10,227,211
Awards Weighted-Average Exercise Price
Beginning balance (in dollar per share)	$ 8.05
Options granted (in dollars per share)	27.74
Options exercised (in dollars per share)	5.64
Options forfeited (in dollars per share)	8.54
Ending balance (in dollar per share)	9.94	$ 8.05
Vested and exercisable (in dollar per share)	5.62
Vested and expected to vest (in dollar per share)	$ 9.94
Stock Options Additional Disclosures
Weighted-Average Remaining Contractual Life (Years)	7 years 10 months 24 days	7 years 9 months 29 days
Vested and exercisable weighted-average remaining contractual life (in years)	6 years 9 months 29 days
Vested and expected to vest weighted-average remaining contractual life (in years)	7 years 10 months 24 days
Aggregate Intrinsic Value	$ 150,611	$ 211,109
Vested and exercisable aggregate intrinsic value	82,463
Vested and expected to vest aggregate intrinsic value	$ 150,611

Fair Value Measurement

3 Months Ended

Mar. 31, 2026

Fair Value Measurement [Abstract]

Fair Value Measurement

4. Fair Value Measurement

The following table summarizes the Company’s financial assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):



	March 31, 2026
	Level 1		Level 2		Level 3		Total
Assets
Money market funds, included in cash equivalents	$	1,348	$	—	$	—	$	1,348
Money market funds, included in restricted cash, non-current		4,702		—		—		4,702
U.S. government securities		—		81,422		—		81,422
U.S. treasury bills		—		19,865				19,865
Corporate bonds/notes		—		63,364		—		63,364
Agency bonds/notes		—		44,029		—		44,029
Asset-backed securities		—		21,613		—		21,613
Commercial paper		—		4,934		—		4,934
Total	$	6,050	$	235,227	$	—	$	241,277



	December 31, 2025
	Level 1		Level 2		Level 3		Total
Assets
Money market funds, included in cash equivalents	$	27,806	$	—	$	—	$	27,806
Money market funds, included in restricted cash, non-current		4,709		—		—		4,709
U.S. government securities		—		81,479		—		81,479
U.S. treasury bills		—		39,593				39,593
Corporate bonds/notes		—		57,571		—		57,571
Agency bonds/notes		—		25,151		—		25,151
Asset-backed securities		—		21,711		—		21,711
Commercial paper		—		9,870		—		9,870
Total	$	32,515	$	235,375	$	—	$	267,890

The following tables present a reconciliation of the Company’s financial liabilities measured at fair value using significant unobservable inputs (Level 3) and the change in fair value during the year ended December 31, 2025 (in thousands):



	Common Stock Warrant Liability
Fair value as of January 1, 2024	$	20,835
Change in fair value		43,894
Reclassification to common stock upon net exercise		(64,729)
Fair value as of December 31, 2025	$	—

In determining the fair value of the common stock warrant liability, the Company used the Black-Scholes option pricing model to estimate the fair value using unobservable inputs including the expected term, expected volatility, risk-free interest rate and dividend yield (see Note 12).



	Convertible Notes ‎Derivative Liability
Fair value as of January 1, 2025	$	—
Recognition of derivative liability related to Convertible Notes		31,900
Change in fair value		(7,311)
Derecognition upon conversion into common stock upon IPO		(24,589)
Fair value as of December 31, 2025	$	—

In determining the fair value of the convertible notes derivative liability, a two-step valuation approach was employed, which included a probability-weighted scenario valuation method, the Monte Carlo Simulation method, and the option pricing method, using unobservable inputs (see Note 13), which are classified as Level 3 within the fair value hierarchy, and then comparing the instrument’s value with and without the derivative features to estimate their combined fair value. The debt instrument is carried at amortized cost, which approximates its fair value.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
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-Publisher FASB
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Subparagraph (a)
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-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

Business Overview

3 Months Ended

Mar. 31, 2026

Business Overview [Abstract]

Business Overview

1. Business Overview

Description of Business

Heartflow, Inc. (the “Company”) was incorporated in the state of Delaware in July 2007.

The Company is a commercial-stage medical technology company that provides software and artificial intelligence (“AI”) designed to deliver a non-invasive solution for diagnosing and managing coronary artery disease (“CAD”). The Company’s novel Heartflow Platform uses AI and advanced computational fluid dynamics to create a personalized 3D model of a patient’s heart based on a single coronary computed tomography angiography (“CCTA”). This results in actionable data on blood flow, stenosis, plaque volume and plaque composition. The Company’s Heartflow FFR_CT Analysis and Plaque Analysis software assists physicians in diagnosing, managing and delivering precision care to patients with CAD. The Company was awarded Conformité Européene Mark for its Heartflow FFR_CT Analysis in July 2011. The Company received clearance from the U.S. Food and Drug Administration (“FDA”) in November 2014 for its Heartflow FFR_CT Analysis and in October 2022 for its Plaque Analysis.

The Company’s headquarters is located in San Francisco, California, and the Company also has offices in Mountain View, Rohnert Park and Santa Rosa, California, Austin, Texas, and Tokyo, Japan.

The Company had the following wholly-owned subsidiaries as of March 31, 2026:


Entity Name		Country of Incorporation
HeartFlow Japan G.K.		Japan
HeartFlow U.K. Ltd		United Kingdom

Effective November 2025, HeartFlow Technology U.K. Limited, a wholly-owned subsidiary in the United Kingdom, was dissolved.

Reverse Stock Split

On July 31, 2025, the Company’s Board of Directors (the “Board of Directors”) approved an amendment to the Company’s amended and restated certificate of incorporation to immediately effect a reverse stock split of the shares of the Company’s outstanding common stock at a ratio of 1.0-for-2.92 (the “Reverse Stock Split”). The number of authorized shares and par value per share were not adjusted as a result of the Reverse Stock Split. All references to shares, options to purchase common stock, share amounts, per share amount, and related information contained in the condensed consolidated financial statements have been retrospectively adjusted to reflect the effect of the Reverse Stock Split for all periods presented. The shares of common stock underlying outstanding stock options and other equity instruments were proportionately reduced, and the respective exercise prices, if applicable, were proportionately increased in accordance with the terms of the agreements governing such securities. In addition, the conversion ratios for each series of the Company’s redeemable convertible preferred stock, which automatically converted into shares of common stock upon the closing of the Company’s initial public offering (the “IPO”) of common stock, were proportionally adjusted.

Initial Public Offering

On August 11, 2025, the Company completed its IPO of 19,166,667 shares of its common stock, which included an additional 2,500,000 shares of common stock purchased by the underwriters pursuant to their option to purchase additional shares, at a price to the public of $19.00 per share. The gross proceeds to the Company from the IPO were approximately $364.2 million, before deducting underwriting discounts and commissions and offering expenses payable by the Company of $31.8 million. Immediately prior to the closing of the Company’s IPO, all of the outstanding shares of the Company’s redeemable convertible preferred stock converted into shares of the Company’s common stock. Additionally, upon the closing of the Company’s IPO, the aggregate outstanding principal balance under the 2025 Convertible Notes (as defined in Note 2) automatically converted into shares of the Company’s common stock.

Liquidity

The Company has incurred operating losses and negative cash flows from operations since its inception and has an accumulated deficit of $1.1 billion as of March 31, 2026. The Company expects to incur losses for the foreseeable future. Historically, the Company’s activities have been financed through sales of shares of redeemable convertible preferred stock, common stock and convertible promissory notes, borrowings under term loans and revenue received from customers.

As of March 31, 2026, the Company had $254.9 million in cash, cash equivalents and investments in available-for-sale securities.

Based on the Company’s current operating plan, the Company believes that the expected cash generated from revenue transactions with customers and its existing cash and cash equivalents and available-for-sale securities will be sufficient to fund the Company’s planned operating expenses and capital expenditure requirements for at least the next 12 months from the date these condensed consolidated financial statements were available to be issued.

Stockholders' Equity

3 Months Ended

Mar. 31, 2026

Stockholders' Equity [Abstract]

Stockholders' Equity

11. Stockholders’ Equity

Preferred Stock

At March 31, 2026, the Company’s certificate of incorporation, as amended and restated, authorizes the Company to issue up to 50,000,000 shares of preferred stock with $0.001 par value per share, of which no shares were issued and outstanding.

Common Stock

At March 31, 2026, under the Company’s Amended and Restated Certificate of Incorporation, the Company is authorized to issue 250,000,000 shares of $0.001 par value common stock, of which 86,105,290 shares were issued and outstanding. The holders of common stock are also entitled to receive dividends whenever funds are legally available, when and if declared by the Board of Directors. As of March 31, 2026, no dividends have been declared to date. Each share of common stock is entitled to one vote.

Common stock reserved for future issuance, on an as-converted basis, consisted of the following:



	March 31,	December 31,
	2026	2025
Options to purchase common stock	10,227,211	10,003,254
Restricted stock units	1,840,421	907,703
Shares reserved for issuance under the Company's equity plans	11,648,505	14,085,870
Total	23,716,137	24,996,827

- Definition

The entire disclosure for equity.

+ References

+ Details

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2026

Summary of Significant Accounting Policies [Abstract]

Basis of Presentation

The accompanying condensed consolidated financial statements include the accounts of the Company as well as its wholly owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). All significant intercompany balances and transactions have been eliminated in consolidation.

The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to a fair statement of the Company’s consolidated financial position as of March 31, 2026, and the results of its operations for the three months ended March 31, 2026 and 2025 and cash flows for the three months ended March 31, 2026 and 2025. The condensed consolidated balance sheet at December 31, 2025, was derived from audited annual consolidated financial statements but does not contain all of the footnote disclosures from the annual financial statements. These interim financial results are not necessarily indicative of results expected for the full fiscal year or for any subsequent interim period and should be read in conjunction with the annual consolidated financial statements included in the Company’s Annual Report on Form 10-K filed with the SEC on March 18, 2026.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Management uses significant judgment when making estimates in the determination of stock-based compensation, deferred income tax valuation allowance, capitalized internal-use software, depreciation of property and equipment, allowance for credit losses, revenue recognition, valuation of operating lease right-of-use (“ROU”) assets and operating lease liabilities, common stock warrant liability and for periods prior to the Company’s IPO, the fair value of convertible debt, the valuation of common stock and derivative liability. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors and adjusts those estimates and assumptions as facts and circumstances dictate. Actual results could materially differ from those estimates.

Segment Information

The Company operates and manages its business as one reportable and operating segment, which is the business of non-invasive CAD detection solutions. The Company’s Chief Executive Officer, who is the Chief Operating Decision Maker (“CODM”), reviews financial information, including revenue and net loss, presented on a

consolidated basis for purposes of making operating decisions, allocating resources and evaluating financial performance.

The Company’s measure of segment profit or loss is consolidated net loss, which is used by the CODM to measure actual results versus expectations, set performance metrics, and develop the annual budget to achieve the Company’s long-term objectives. Significant segment expenses within consolidated net loss includes cost of revenue, research and development, selling, general and administrative expenses and asset impairment charge, which are each separately presented on the Company’s condensed consolidated statements of operations and comprehensive loss. Other expense items that are presented on the condensed consolidated statements of operations include interest income, interest expense, change in fair value of warrant liability, change in fair value of derivative liability, other income (expense), net, and provision for income taxes.

The following table is representative of the significant expense categories regularly provided to the CODM when managing the Company’s single reporting segment and includes a reconciliation to the consolidated net loss shown in the condensed consolidated statements of operations and comprehensive loss for the three months ended March 31, 2026 and 2025 (in thousands):


	Three Months Ended
	March 31,
	2026		2025
Revenue	$	52,587	$	37,205
Less⁽¹⁾:
Cost of revenue		10,423		9,264
Research and development		21,620		13,924
Selling, general and administrative expenses:
Sales and marketing		29,956		21,635
General and administrative		12,610		9,884
Asset impairment charge		7,482		—
Loss from operations		(29,504)		(17,502)
Other income (expense), net⁽²)		2,147		(14,843)
Provision for income taxes		(23)		—
Segment net loss	$	(27,380)	$	(32,345)

(1)The significant expense categories and amounts align with the segment-level information that is regularly provided to the CODM.

(2)Other income (expense), net represents the consolidated amounts for interest income, interest expense, change in fair value of common stock warrant liability, change in fair value of derivative liability, and other income (expense), net as shown on the condensed consolidated statements of operations and comprehensive loss.

The Company derives revenue and has long-lived assets primarily in the United States of America. Revenue by geography is further described in Note 3.

Cash, Cash Equivalents and Restricted Cash

The Company considers all highly liquid investments that are readily convertible to known amounts of cash and purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents consist primarily of amounts invested in money market accounts.

The following table provides a reconciliation of cash, cash equivalents and restricted cash to the total shown in the condensed consolidated statements of cash flows (in thousands):



	March 31,
	2026		2025
Cash and cash equivalents	$	19,671	$	109,786
Restricted cash		4,702		4,475
Total cash, cash equivalents and restricted cash	$	24,373	$	114,261

As of March 31, 2026 and December 31, 2025, restricted cash primarily represents deposits held as security in connection with the Company’s facility lease agreements.

Investments

Short-term and long-term investments consist of debt securities classified as available-for-sale. Short-term investments have original maturities greater than 90 days, but less than one year as of the balance sheet date. Long-term investments have maturities greater than one year as of the balance sheet date. All investments are recorded at fair value based on the fair value hierarchy. Unrealized gains and losses, deemed temporary in nature, are reported as a separate component of accumulated other comprehensive income (loss). Realized gains and losses are included in earnings and are derived based on the specific-identification method for determining the costs of investments sold. Amortization of premiums and accretion of discounts are reported as a component of interest income.

A decline in the fair value of any security below cost that is deemed other than temporary results in a charge to earnings and the corresponding establishment of a new cost basis for the investment. The Company evaluates the securities in an unrealized loss position for expected credit losses by considering factors such as historical experience, market data, issuer-specific factors, current economic conditions and credit ratings. The Company did not recognize any credit losses on its available-for-sale securities during the three months ended March 31, 2026 and there were no impairment charges for unrealized losses during the period. The Company had no investments during the three months ended March 31, 2025.

Fair Value of Financial Instruments

The Company measures certain financial assets and liabilities at fair value on a recurring basis. Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability.

The Company discloses and recognizes the fair value of its assets and liabilities using a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to valuations based upon unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to valuations based upon unobservable inputs that are significant to the valuation (Level 3 measurements). The accounting guidance establishes three levels of the fair value hierarchy as follows:

Level 1 - Observable inputs, such as quoted prices in active markets for identical assets or liabilities;

Level 2 - Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires management to make judgments and considers factors specific to the asset or liability.

As of March 31, 2026 and December 31, 2025, the carrying amounts of the Company’s financial instruments carried at amortized cost, including cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate fair value due to their relatively short maturities and market interest rates, if applicable.

Concentration of Credit Risk and Significant Customers

Financial instruments that potentially subject the Company to credit risk consist primarily of cash and cash equivalents, investments, restricted cash and accounts receivable. The Company maintains bank deposits in federally insured financial institutions, and these deposits may at times exceed federally insured limits. The Company

currently has full control of its cash and cash equivalents balance. Cash equivalents are invested in highly rated money market funds. The Company invests in a variety of financial instruments, such as, but not limited to, commercial paper, corporate bonds/notes, U.S. government securities, U.S. treasury bills, agency bonds/notes, and, by policy, limits the amount of credit exposure with any one financial institution or commercial issuer. To date, the Company has not experienced any losses on its deposits of cash and cash equivalents or investments.

No single customer represented more than 10% of the Company’s revenue during the three months ended March 31, 2026 and 2025.

No single customer represented more than 10% of the Company’s accounts receivable as of March 31, 2026 and December 31, 2025.

Impairment of Long-Lived Assets

The Company reviews its long-lived assets, including property and equipment, for impairment at least annually and whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When factors indicate that long-lived assets should be evaluated for possible impairment, the Company uses an estimate of the related undiscounted future cash flows over the remaining useful life of the long-lived assets in measuring whether they are recoverable. If the asset or asset group is not recoverable, an impairment loss is recognized based on the excess of the carrying amount over the fair value of the asset or asset group. During the three months ended March 31, 2026, the Company recognized an asset impairment charge of $7.5 million. See Note 6 for additional information. There were no long-lived asset impairments during the three months ended March 31, 2025.

Leases

At the inception of a contractual arrangement, the Company determines whether the contract contains a lease by assessing whether there is an identified asset and whether the contract conveys the right to control the use of the identified asset in exchange for consideration over a period of time.

An ROU asset and corresponding lease liability are recorded on the condensed consolidated balance sheets based on the present value of lease payments over the lease term. An ROU asset represents the right to control the use of an identified asset over the lease term, and a lease liability represents the obligation to make lease payments arising from the lease. Leases with an initial term of 12 months or less are not recorded in the condensed consolidated balance sheets. The Company uses its incremental borrowing rate to determine the present value of lease payments, as the discount rate implicit in the lease is not readily available. The lease terms used to calculate the ROU asset and related lease liabilities include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. The Company elected to account for contracts that contain lease and non-lease components as a single lease component. For the three months ended March 31, 2026 and 2025, the Company’s only leases were for its facilities, which are classified as operating leases with lease expense recognized on a straight-line basis over the lease term. Variable lease costs, which primarily consist of common area maintenance, taxes, and utility charges, are expensed as incurred. The Company does not have any finance leases.

Revenue Recognition

The Company sells its Heartflow Platform to medical providers in the United States and in select international markets. The Company determines revenue recognition through the following steps:

•Identification of the contract, or contracts, with a customer;

•Identification of the performance obligations in the contract;

•Determination of the transaction price;

•Allocation of the transaction price to the performance obligations in the contract; and

•Recognition of revenue when, or as, the Company satisfies a performance obligation.

The Company identified a single performance obligation, which is comprised of a highly interdependent bundle of goods or services that are not distinct on their own but are as a group and consists of the requested analysis, including an image file and related licenses and support. Revenue recognition commences only after completion of installation, implementation and training for new customer accounts. The Company’s service consists of providing a visualization of the patient’s coronary arteries and enables physicians to create more effective treatment plans. This service is normally billable upon delivery of the analysis to the physician. Payment terms are generally net 30 days.

Substantially all of the Company’s revenue is from usage-driven fees and generated on a “pay-per-click” basis each time a physician orders the Company’s Heartflow FFR_CT Analysis and Plaque Analysis. Revenue is recognized when control of these services is transferred to the customer, at an amount that reflects the consideration the Company expects to be entitled to receive in exchange for those services. The Company recognizes usage-driven fee revenue upon delivery of the requested analysis to the physician, which is when control of these services is transferred to the customer. The Company recognizes revenue on a straight-line basis over the contract term for subscriptions where the customer pays a fixed amount upfront for unlimited analyses. Contracts with customers typically include a fixed amount of consideration and are generally cancellable with 30 days’ written notice.

The transaction price consists of fixed consideration and variable consideration related to utilization and volume rebates for reimbursement claims from government and commercial payors which are known and determinable based on the number of analyses delivered within each quarterly period. The transaction price (inclusive of both fixed consideration and variable consideration that is not constrained) is recognized as revenue when control transfers. The Company uses a portfolio approach to estimate variable consideration using the expected value method.

Unbilled Receivables

Unbilled receivables generally represent revenue in which the Company has satisfied its performance obligation prior to invoicing. The Company records unbilled receivables within accounts receivable, net on the condensed consolidated balance sheets, based on the Company’s unconditional right to payment at the end of the applicable period.

Contract Costs

Costs associated with product revenue include a flat rate commission per analysis and new customer site commissions as well as implementation and onboarding costs. The Company capitalizes new customer site commissions and certain contract fulfillment costs, which include implementation and onboarding costs that are considered to be incremental to the acquisition of new customer contracts. Capitalized contract fulfillment costs are amortized over an estimated period of benefit of two years and capitalized new site commission costs are amortized over an estimated period of benefit of three years. The estimated period of benefit is determined by evaluating average customer life, the nature of the related benefit, and the specific facts and circumstances of the arrangements. The Company evaluates these assumptions at least annually and periodically reviews whether events or changes in circumstances have occurred that could impact the period of benefit.

The Company expenses flat rate commissions when incurred as commensurate with its usage-driven fee revenue recognition and amortizes capitalized new customer site commissions to selling, general and administrative expense in the condensed consolidated statements of operations and comprehensive loss. The Company amortizes capitalized contract fulfillment costs to cost of revenue in the condensed consolidated statements of operations and comprehensive loss.

Remaining Performance Obligations

Revenue allocated to remaining performance obligations represents the transaction price allocated to performance obligations that are unsatisfied, or partially unsatisfied. It includes contract liabilities and amounts that will be invoiced and recognized as revenue in future periods and does not include contracts where the customer is not committed. The customer is considered not committed when they are able to terminate for convenience without

payment of a substantive penalty under the contract. Additionally, as a practical expedient, the Company has not disclosed the value of unsatisfied performance obligations for contracts with an original expected length of one year or less.

Contract Liabilities

The Company records contract liabilities when billings or payments are received in advance of revenue recognition. The contract liabilities balance is reduced as the revenue recognition criteria is met, generally within 12 months. Once services are available to customers, the Company records amounts due in accounts receivable, net and contract liabilities within accrued expenses and other current liabilities on the condensed consolidated balance sheets. To the extent the Company bills customers in advance of the billing period commencement date, the accounts receivable and corresponding contract liabilities amount are netted to zero on the condensed consolidated balance sheets, unless such amounts have been paid as of the balance sheet date.

Cost of Revenue

Cost of revenue consists of personnel and related expenses, including stock-based compensation costs, primarily related to our production team. Additional costs include third-party hosting fees, amortization of capitalized internal-use software, amortization of contract fulfillment costs as well as royalties associated with technology licenses used in connection with the delivery of the Company’s product and allocated overhead, which includes facilities expenses, equipment, depreciation and technology services. These costs are partially offset by capitalized contract fulfillment costs. The role of the production team is to support the Company’s patient case volume revenue by performing defined quality-related activities on CCTA scans submitted by its customers for analysis. The portion of these costs that supports patient case volume revenue is recorded as cost of revenue. The production team also supports activities in the Company’s clinical trials and research and development, which are allocated as research and development expense.

Stock-Based Compensation

The Company accounts for share-based payments at fair value. The grant date fair value of options granted is measured using the Black-Scholes option pricing model. Option awards vest based on the satisfaction of a service requirement, and stock-based compensation expense is recorded on a straight-line basis over the applicable service period, which is generally four years. For performance-based stock options, the Company will assess the probability of performance conditions being achieved in each reporting period. The amount of stock-based compensation expense recognized in any one period related to performance-based stock options can vary based on the achievement or anticipated achievement of the performance conditions. Forfeitures are recognized in the period in which the forfeiture occurs.

The Company accounts for stock-based compensation for restricted stock units at their fair value, based on the closing market price of the Company’s common stock on the date of grant. These costs are recognized on a straight-line basis over the requisite service period, which is usually the vesting period.

The Company accounts for stock-based compensation for its employee stock purchase plan based on the estimated fair value of the options on the date of grant. The Company estimates the grant date fair value using the Black-Scholes option pricing model for each purchase period. These costs are recognized on a straight-line basis over the offering period.

Income Taxes

The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on the temporary differences between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. As a result of the history of net operating losses, the Company has provided for a full valuation allowance in the United States against the deferred tax assets for assets that are not more-likely-than-not to be realized.

The Company applies a comprehensive model for the recognition, measurement, presentation and disclosure in the condensed consolidated financial statements of any uncertain tax positions that have been taken or are expected to be taken on a tax return using a two-step approach. The first step is to evaluate the tax position taken or expected to be taken in a tax return by determining if the weight of available evidence indicates that it is more likely than not that the tax position will be sustained upon examination by the relevant taxing authorities, based on the technical merits of the position. For tax positions that are more likely than not to be sustained upon audit, the second step is to measure the tax benefit in the financial statements as the largest benefit that has a greater than 50% likelihood of being sustained upon settlement. Significant judgment is required to evaluate uncertain tax positions. Changes in facts and circumstances could have a material impact on the Company’s effective tax rate and results of operations. The Company recognizes interest and penalties, if any, related to unrecognized tax benefits as a component of provision for income taxes in the condensed consolidated statements of operations and comprehensive loss.

Comprehensive Loss

Comprehensive loss is comprised of net loss, changes in unrealized gains and losses on investments classified as available-for-sale and foreign currency translation gains and losses.

Foreign Currency

The functional currency of the Company’s foreign subsidiaries is the local currency. For all non-functional currency balances, the remeasurement of such balances to the functional currency results in either a foreign exchange transaction gain or loss, which is recorded within other income, net within the condensed consolidated statements of operations and comprehensive loss. The Company recognized a foreign exchange transaction loss of $(418,000) and $(357,000) during the three months ended March 31, 2026 and 2025, respectively. The Company recognized $262,000 and $(236,000) during the three months ended March 31, 2026 and 2025, respectively, of foreign currency translation gain (loss) in the condensed statements of comprehensive loss related to foreign subsidiaries which have local functional currencies.

Net Loss Per Share

Basic net loss per common share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, without consideration of potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock and potentially dilutive securities outstanding for the period. For purposes of the diluted net loss per share calculation, the redeemable convertible preferred stock, common stock warrants, common stock options and restricted stock units are considered to be potentially dilutive securities.

Basic and diluted net loss per share is presented in conformity with the two-class method required for participating securities as the redeemable convertible preferred stock and common stock subject to repurchase are considered participating securities. The Company’s participating securities do not have a contractual obligation to share in the Company’s losses. As such, the net loss is attributed entirely to common stockholders. Diluted net loss per share is the same as basic net loss per share because the effects of potentially dilutive items were anti-dilutive given the Company’s net loss position during the three months ended March 31, 2026 and 2025.

Recent Accounting Pronouncements

From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (“FASB”) or other standard setting bodies and adopted by the Company as of the specified effective date. The Company qualifies as an “emerging growth company” as defined in the Jumpstart Our Business Startups Act of 2012 and has elected not to “opt out” of the extended transition related to complying with new or revised accounting standards, which means that when a standard is issued or revised and it has different application dates for public and nonpublic companies, the Company will adopt the new or revised standard at the time nonpublic companies adopt the new or revised standard and will do so until such time that the Company either (i) irrevocably elects to “opt out” of such extended transition period or (ii) no longer qualifies as an emerging growth company. The Company may

choose to early adopt any new or revised accounting standards whenever such early adoption is permitted for nonpublic companies.

Recently Adopted Accounting Pronouncements

In July 2025, the FASB issued ASU 2025-05, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, which provides a practical expedient related to the estimation of expected credit losses for current accounts receivable and current contract assets that arise from transactions accounted for under Accounting Standards Codification Topic 606: Revenue from Contracts with Customers. The practical expedient permits an entity to assume that current conditions as of the balance sheet date do not change for the remaining life of the current accounts receivable and current contract assets. This ASU was effective for the Company on January 1, 2026. The adoption of this pronouncement did not have a material impact on its condensed consolidated financial statements.

Recent Accounting Pronouncements Not Yet Adopted

In November 2024, the FASB issued ASU 2024-03, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires more detailed disclosures about specified categories of expenses (including employee compensation, depreciation, and amortization) included in certain expense captions presented on the face of the income statement. This ASU is effective for fiscal years beginning after December 15, 2026, and for interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The amendments may be applied either (i) prospectively to financial statements issued for reporting periods after the effective date of this ASU or (ii) retrospectively to all prior periods presented in the financial statements. The Company is currently evaluating the impact of this pronouncement on the disclosures in its consolidated financial statements.

In September 2025, the FASB issued ASU 2025-06, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, which amends certain aspects of the accounting for and disclosure of software costs under ASC 350-40 by removing all references to project development stages and provides new guidance on how to evaluate whether the probable-to-complete recognition threshold has been met to begin capitalizing software costs. This ASU is effective for fiscal years beginning after December 15, 2027 and for interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The ASU may be applied on a prospective, retrospective or modified prospective basis. The Company is currently evaluating the impact of the adoption of this pronouncement on its consolidated financial statements.

Derivative Liability (Schedule of Assumptions Used in Determining Fair Value Derivative Liability) (Details) - Valuation Technique, Monte Carlo Pricing Model [Member]	Mar. 26, 2025	Jan. 31, 2025
Debt Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	0.070	0.070
Probability of IPO [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	0.750	0.600
Probability of Change of Control [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	0.100	0.200
Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	0.637	0.313

Balance Sheet Components (Schedule of Other Non-Current Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Components [Abstract]
Contract costs, net	$ 5,071	$ 4,260
Other	1,604	839
Total other non-current assets	$ 6,675	$ 5,099

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Current assets
Cash and cash equivalents	$ 19,671	$ 44,776
Short-term investments	138,645	132,010
Accounts receivable, net of allowance for credit losses of $626 at March 31, 2026 and December 31, 2025	35,527	29,343
Prepaid expenses and other current assets	17,987	14,075
Total current assets	211,830	220,204
Long-term investments	96,582	103,365
Property and equipment, net	9,829	8,587
Operating lease right-of-use assets	14,407	17,488
Restricted cash, non-current	4,702	4,709
Other non-current assets	6,675	5,099
Total assets	344,025	359,452
Current liabilities
Accounts payable	5,750	3,169
Accrued expenses and other current liabilities	25,886	33,279
Operating lease liabilities, current	6,382	5,922
Total current liabilities	38,018	42,370
Operating lease liabilities, non-current	19,967	16,132
Other non-current liabilities	322	303
Total liabilities	58,307	58,805
Commitments and contingencies (Note 7)
Stockholders’ equity
Preferred stock, $0.001 par value; 50,000,000 shares authorized as of March 31, 2026 and December 31, 2025; no shares issued and outstanding as of March 31, 2026 and December 31, 2025
Common stock, $0.001 par value; 250,000,000 shares authorized as of March 31, 2026 and December 31, 2025; 86,105,290 and 85,280,597 shares issued and outstanding as of March 31, 2026 and December 31, 2025, respectively	86	85
Additional paid-in capital	1,401,447	1,388,737
Accumulated other comprehensive loss	(685)	(425)
Accumulated deficit	(1,115,130)	(1,087,750)
Total stockholders’ equity	285,718	300,647
Total liabilities and stockholders’ equity	$ 344,025	$ 359,452

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2026
Insider Trading Arrangements [Line Items]
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Redeemable Convertible Preferred Stock

3 Months Ended

Mar. 31, 2026

Redeemable Convertible Preferred Stock [Abstract]

Redeemable Convertible Preferred Stock

10. Redeemable Convertible Preferred Stock

Upon the closing of the IPO, all shares of convertible preferred stock then outstanding converted into 51,226,348 shares of common stock. Shares of Series A, Series B-1, Series B-2, Series C, Series D, Series E, Series F and Series F-1 outstanding redeemable convertible preferred stock converted into shares of common stock on a 0.342466:1, 0.403088:1, 0.403088:1, 0.576386:1, 0.646673:1, 0.695098:1, 0.342466:1, and 0.342466:1 basis, as adjusted for the Reverse Stock Split, respectively. As of March 31, 2026, the Company does not have any convertible preferred stock issued or outstanding.

Net Loss Per Share (Schedule of Outstanding Shares of Potentially Dilutive Securities) (Details) - shares	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted net loss per share (in shares)	12,208,816	132,462,824
Redeemable Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted net loss per share (in shares)		122,231,454
Options to Purchase Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted net loss per share (in shares)	10,227,211	8,583,703
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted net loss per share (in shares)	1,840,421
ESPP [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted net loss per share (in shares)	141,184
Common Stock Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted net loss per share (in shares)		1,647,667

Term Loan (Prepayment Terms and Other Fees) (Details) - USD ($) $ in Thousands			3 Months Ended
	Aug. 22, 2025	Aug. 18, 2025	Mar. 31, 2025
Debt Instrument [Line Items]
Payment for debt extinguishment or debt prepayment cost			$ 518
Amended 2024 Credit Agreement [Member]
Debt Instrument [Line Items]
Exit fee (as percent)		3.00%
Early prepayment fee (as percent)		3.00%
Payment for debt extinguishment or debt prepayment cost		$ 5,800
Repayment of long-term debt		$ 55,000
Aggregate principal amount	$ 60,100
Accrued interest	$ 1,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Leases (Narrative) (Details)		1 Months Ended			3 Months Ended
Leases (Narrative) (Details)	Mar. 17, 2026 USD ($) ft²	Mar. 31, 2026 USD ($)	Jan. 31, 2026 USD ($) item	Dec. 31, 2025 USD ($) ft²	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2025 USD ($) ft²	Jul. 31, 2025 USD ($) ft²	Nov. 30, 2024 item	Oct. 31, 2024 USD ($) ft²	Apr. 30, 2024 USD ($)	Aug. 21, 2021 USD ($) ft²
Lessee, Lease, Description [Line Items]
Asset impairment charge					$ 7,482,000
ROU asset impairment					7,400,000
Impairment of leasehold improvements					136,000
Lease liability		$ 26,349,000			26,349,000
Operating lease right-of-use assets		14,407,000		$ 17,488,000	14,407,000
Number of options \| item			2
Cash paid for amounts included in measurement of operating lease liabilities					1,500,000	$ 1,400,000
Mountain View, California [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) \| ft²												61,000
Letter of credit provided in place of security deposit		$ 800,000			800,000							$ 4,300,000
Sublease, initial occupancy percentage		52.00%
Santa Rosa, California [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) \| ft²										4,000
Leases, initial term (in months)										29 months
Security deposit										$ 8,000
Lease liability										169,000
Operating lease right-of-use assets										$ 169,000
San Francisco, California [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) \| ft²	5,018							8,100
Leases, initial term (in months)	51 months							39 months
Security deposit	$ 62,000							$ 90,000
Lease liability								1,254,000
Operating lease right-of-use assets								$ 1,254,000
Average monthly payment	47,400
Monthly payment, amended lease term	$ 26,500
Rohnert Park, California [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) \| ft²				13,100
Tenant improvement allowance				$ 173,000
Leases, initial term (in months)				63 months
Security deposit				$ 39,000
Lease liability				2,800,000
Operating lease right-of-use assets				$ 2,800,000
Austin, Texas [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) \| ft²							26,000
Tenant improvement allowance			$ 71,000
Leases, initial term (in months)			51 months				12 months
Security deposit		$ 150,000			150,000
Lease liability			$ 2,500,000				$ 561,000
Operating lease right-of-use assets			$ 2,500,000				$ 561,000
Renewal term			3 years
Tokyo, Japan [Member]
Lessee, Lease, Description [Line Items]
Lease liability											$ 420,000
Operating lease right-of-use assets											$ 420,000
Renewal term											3 years
Number of contracts \| item									1
Minimum [Member] \| Mountain View, California [Member]
Lessee, Lease, Description [Line Items]
Sublease, annual base rent		1,200,000			1,200,000
Maximum [Member] \| Mountain View, California [Member]
Lessee, Lease, Description [Line Items]
Sublease, annual base rent		$ 2,400,000			$ 2,400,000

Net Loss Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Numerator:
Net loss	$ (27,380)	$ (32,345)
Denominator:
Weighted-average shares used to compute net loss per share, basic (in shares)	85,639,675	6,164,617
Weighted-average shares used to compute net loss per share, diluted (in shares)	85,639,675	6,164,617
Net loss per share, basic	$ (0.32)	$ (5.25)
Net loss per share, diluted	$ (0.32)	$ (5.25)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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-URI https://asc.fasb.org/1943274/2147483443/250-10-50-8

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-7

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(18))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(9))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(1)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
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-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 34: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-Publisher FASB
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Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 37: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
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Reference 38: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
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Reference 39: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
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-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 40: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
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-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 41: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
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-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 42: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 43: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

Reference 44: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
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-SubTopic 10
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
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Reference 46: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (a)
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Reference 47: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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-Section 45
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B

Reference 48: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481538/470-20-65-4

Reference 49: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

+ Details

Stock-Based Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	23,716,137		24,996,827
Weighted average grant date fair value (in dollars per share)	$ 15.88	$ 7.10
Aggregate intrinsic value	$ 12,200	$ 1,100
Stock-based compensation costs related to unvested stock options	40,900
Stock-based compensation expense	$ 6,554	$ 2,492
2025 Performance Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	17,346,193
Annual increase in common stock available for issuance	5.00%
2025 Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	1,233,964
Annual increase in common stock available for issuance	1.00%
Purchase price of common stock as percentage of fair market value	85.00%
Tranche Two Through Thirty-Seven [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting, percentage	0.02083%
Tranche One Through Forty-Eight [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	4 years
Options to Purchase Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	10,227,211		10,003,254
Share-based payment award, expiration period (in years)	10 years
Vesting period	4 years
Weighted-average period (in years)	3 years 3 months 21 days
Options to Purchase Common Stock [Member] \| Tranche One Through Thirty-Seven [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	4 years
Options to Purchase Common Stock [Member] \| Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting, percentage	25.00%
Incentive Stock Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Threshold of voting power in company that triggers increase in minimum exercise price of share based payment awards	10.00%
Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	1,840,421		907,703
Vesting period	4 years
Weighted-average period (in years)	3 years 9 months
Unrecognized compensation costs	$ 42,400
ESPP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted-average period (in years)	5 months 8 days
Unrecognized compensation costs	$ 1,100
Minimum [Member] \| Options to Purchase Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, purchase price of common stock, percentage	100.00%
Maximum [Member] \| Incentive Stock Options [Member] \| Employee Who Owns More Than Ten Percent Of Voting Power Of All Classes Of Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, purchase price of common stock, percentage	110.00%

Redeemable Convertible Preferred Stock (Narrative) (Details)		3 Months Ended
	Aug. 11, 2025	Mar. 31, 2026 shares	Dec. 31, 2025 shares
Temporary Equity [Line Items]
Conversion price, discount percentage	20.00%
Preferred stock, shares issued (in shares)		0	0
Preferred stock, shares outstanding (in shares)		0	0
Common Stock [Member]
Temporary Equity [Line Items]
Conversion of convertible notes into shares		51,226,348
Series A [Member]
Temporary Equity [Line Items]
Conversion ratio		0.342466
Series B-1 [Member]
Temporary Equity [Line Items]
Conversion ratio		0.403088
Series B-2 [Member]
Temporary Equity [Line Items]
Conversion ratio		0.403088
Series C [Member]
Temporary Equity [Line Items]
Conversion ratio		0.576386
Series D [Member]
Temporary Equity [Line Items]
Conversion ratio		0.646673
Series E [Member]
Temporary Equity [Line Items]
Conversion ratio		0.695098
Series F [Member]
Temporary Equity [Line Items]
Conversion ratio		0.342466
Series F-1 [Member]
Temporary Equity [Line Items]
Conversion ratio		0.342466

Commitment and Contingencies (Schedule of Future Minimum Royalty Commitments) (Details) $ in Thousands	Mar. 31, 2026 USD ($)
Commitments and Contingencies [Abstract]
2026
2027	50
2028	50
2029	50
2030	50
Thereafter	50
Total minimum royalty commitments	$ 250

Revenue and Contract Balances (Tables)

3 Months Ended

Mar. 31, 2026

Revenue and Contract Balances [Abstract]

Schedule of Total Revenue From Customers By Geographic Region



	Three Months Ended March 31,
	2026		2025
United States	$	48,987	$	34,298
Rest of World		3,600		2,907
Total revenue	$	52,587	$	37,205

Schedule of Capitalized Contract Costs



	Three Months Ended March 31,		Year Ended December 31,
	2026		2025
Balance at beginning of period	$	10,929	$	6,154
Contract costs capitalized		4,489		10,795
Contract costs amortized		(2,145)		(6,020)
Balance at end of period	$	13,273	$	10,929

Schedule of Contract Liabilities


	Three Months Ended March 31,		Year Ended December 31,
	2026		2025
Balance at beginning of period	$	327	$	182
Contract liabilities added		148		279
Contract liabilities recognized as revenue		(89)		(134)
Balance at end of period	$	386	$	327

Revenue and Contract Balances

3 Months Ended

Mar. 31, 2026

Revenue and Contract Balances [Abstract]

Revenue and Contract Balances

3. Revenue and Contract Balances

Disaggregation of Revenue

The following table summarizes total revenue from customers by geographic region (in thousands):



	Three Months Ended March 31,
	2026		2025
United States	$	48,987	$	34,298
Rest of World		3,600		2,907
Total revenue	$	52,587	$	37,205

Revenues by geography are determined based on the region of the Company’s contracting entity, which may be different than the region of the customer.

Contract Balances

Unbilled receivables included within accounts receivable on the condensed consolidated balance sheets as of March 31, 2026 and December 31, 2025 was $835,000 and $814,000, respectively.

The following table provides the breakdown of capitalized contract costs on the condensed consolidated balance sheets (in thousands):



	Three Months Ended March 31,		Year Ended December 31,
	2026		2025
Balance at beginning of period	$	10,929	$	6,154
Contract costs capitalized		4,489		10,795
Contract costs amortized		(2,145)		(6,020)
Balance at end of period	$	13,273	$	10,929

The following table provides the breakdown of contract liabilities included within accrued expenses and other current liabilities on the condensed consolidated balance sheets (in thousands):


	Three Months Ended March 31,		Year Ended December 31,
	2026		2025
Balance at beginning of period	$	327	$	182
Contract liabilities added		148		279
Contract liabilities recognized as revenue		(89)		(134)
Balance at end of period	$	386	$	327

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-15

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

+ Details

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net loss	$ (27,380)	$ (32,345)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,423	1,372
Stock-based compensation expense	6,554	2,492
Asset impairment charge	7,482
Amortization of debt discount and debt issuance costs		998
Amortization of right-of-use asset	1,011	724
Accretion of discounts on investments, net	(836)
Change in fair value of common stock warrant liability		1,606
Change in fair value of derivative liability		9,045
Non-cash interest charges		545
Change in allowance for credit losses		(72)
Changes in assets and liabilities:
Accounts receivable	(6,184)	(3,601)
Prepaid expenses and other current assets	(3,912)	(409)
Other non-current assets	(1,576)	(341)
Accounts payable	1,669	(1,627)
Accrued expenses and other current liabilities	(7,393)	9,301
Operating lease liabilities	(981)	(888)
Other non-current liabilities	19	34
Net cash used in operating activities	(30,104)	(13,166)
Cash flows from investing activities:
Purchase of property and equipment	(1,889)	(1,101)
Purchase of investments	(29,538)
Maturities of investments	30,000
Net cash used in investing activities	(1,427)	(1,101)
Cash flows from financing activities:
Proceeds from convertible notes offering, net of issuance costs		73,860
Proceeds from exercise of stock options	3,342	578
Issuance of common stock under employee stock purchase plan	3,288
Payments of exit, prepayment penalty and lender fees		(518)
Payment of taxes related to vested restricted stock units	(473)
Payment of deferred offering costs		(998)
Net cash provided by financing activities	6,157	72,922
Effect of foreign exchange rates	262	(236)
Net increase (decrease) in cash and cash equivalents	(25,112)	58,419
Balance, beginning of period	49,485	55,842
Balance, end of period	24,373	114,261
Supplemental disclosure of cash flow information:
Cash paid for interest		3,439
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property and equipment included in accounts payable	912	6
Right-of-use asset obtained in exchange for lease obligation	$ 5,276	561
Conversion of term loan principal to convertible notes		23,000
Issuance of convertible notes to certain employees in lieu of cash compensation		1,353
Reclassification of term loan debt discount to convertible notes debt discount		239
Unpaid deferred offering costs included in accounts payable and accrued expenses and other current liabilities		2,325
Unpaid convertible notes issuance costs included in accounts payable and accrued expenses and other current liabilities		$ 1,114

Revenue and Contract Balances (Schedule of Contract Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Change In Contract With Customer, Liability [Roll Forward]
Balance at beginning of period	$ 327	$ 182
Contract liabilities added	148	279
Contract liabilities recognized as revenue	(89)	(134)
Balance at end of period	$ 386	$ 327

Term Loan (Interest) (Details) - 2024 Credit Agreement [Member]	3 Months Ended
	Mar. 31, 2026
Debt Instrument [Line Items]
Option to pay interest in-kind (as percent)	1.00%
Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	6.00%
Base Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	7.00%
Base Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	6.00%
Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	2.00%
Prime Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	0.50%
Federal Reserve Bank Of New York Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	0.50%
One-Month Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	1.00%

Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2026

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis



	March 31, 2026
	Level 1		Level 2		Level 3		Total
Assets
Money market funds, included in cash equivalents	$	1,348	$	—	$	—	$	1,348
Money market funds, included in restricted cash, non-current		4,702		—		—		4,702
U.S. government securities		—		81,422		—		81,422
U.S. treasury bills		—		19,865				19,865
Corporate bonds/notes		—		63,364		—		63,364
Agency bonds/notes		—		44,029		—		44,029
Asset-backed securities		—		21,613		—		21,613
Commercial paper		—		4,934		—		4,934
Total	$	6,050	$	235,227	$	—	$	241,277



	December 31, 2025
	Level 1		Level 2		Level 3		Total
Assets
Money market funds, included in cash equivalents	$	27,806	$	—	$	—	$	27,806
Money market funds, included in restricted cash, non-current		4,709		—		—		4,709
U.S. government securities		—		81,479		—		81,479
U.S. treasury bills		—		39,593				39,593
Corporate bonds/notes		—		57,571		—		57,571
Agency bonds/notes		—		25,151		—		25,151
Asset-backed securities		—		21,711		—		21,711
Commercial paper		—		9,870		—		9,870
Total	$	32,515	$	235,375	$	—	$	267,890

Common Stock Warrant Liability [Member]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Schedule of Significant Unobservable Inputs (Level 3) and the Change in Fair Value



	Common Stock Warrant Liability
Fair value as of January 1, 2024	$	20,835
Change in fair value		43,894
Reclassification to common stock upon net exercise		(64,729)
Fair value as of December 31, 2025	$	—

Convertible Notes Derivative Liability [Member]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Schedule of Significant Unobservable Inputs (Level 3) and the Change in Fair Value



	Convertible Notes ‎Derivative Liability
Fair value as of January 1, 2025	$	—
Recognition of derivative liability related to Convertible Notes		31,900
Change in fair value		(7,311)
Derecognition upon conversion into common stock upon IPO		(24,589)
Fair value as of December 31, 2025	$	—

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Commitment and Contingencies (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Loss Contingencies [Line Items]
Contractual obligation	$ 250,000
Royalty expense	568,000	$ 414,000
Estimated purchase commitment, amount	$ 6,000,000.0
Purchase commitment, period (in years)	3 years
Contingent liabilities	$ 0		$ 0
Minimum [Member]
Loss Contingencies [Line Items]
Contractual obligation	$ 50,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-9

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 720
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483359/720-20-50-1

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 27
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482395/460-10-55-27

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

+ Details

Stock-Based Compensation Plans (Summary of RSU Activity) (Details) - Restricted Stock Units [Member]	3 Months Ended
	Mar. 31, 2026 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Beginning balance, unvested, number of units \| shares	907,703
Awards granted, number of units \| shares	1,019,499
Awards vested, number of units \| shares	(45,779)
Awards canceled, number of units \| shares	(41,002)
Ending balance, unvested, number of units \| shares	1,840,421
Beginning balance, weighted-average grant date fair value \| $ / shares	$ 20
Awards granted, weighted-average grant date fair value \| $ / shares	27.22
Awards vested, weighted-average grant date fair value \| $ / shares	19
Awards canceled, weighted-average grant date fair value \| $ / shares	21.48
Ending balance, weighted-average grant date fair value \| $ / shares	$ 24.15

Term Loan

3 Months Ended

Mar. 31, 2026

Term Loan [Abstract]

Term Loan

8. Term Loan

2024 Credit Agreement

On June 14, 2024, the Company entered into a Credit Agreement and Guaranty (the “2024 Credit Agreement”) with Hayfin Services, LLP (“Hayfin”) for a $138.1 million term loan (the “2024 Term Loan”) to refinance its outstanding loan obligations under the 2021 Credit Agreement, as amended (the “2021 Credit Agreement”). In addition, in connection with the 2024 Term Loan, the Company entered into several other adjoining agreements with Hayfin. The 2024 Term Loan extended the maturity date from January 19, 2026 to June 14, 2028. The 2024 Credit Agreement was accounted for as a debt modification for accounting purposes.

On January 24, 2025, in connection with the issuance of the 2025 Convertible Notes, the Company entered into Amendment No. 1 to the 2024 Credit Agreement, in which Hayfin converted $23.0 million of principal under the 2024 Term Loan to 2025 Convertible Notes under the same terms as the other purchasers of the 2025 Convertible Notes. The amendment was accounted for as a debt modification for accounting purposes.

On August 18, 2025, the Company repaid $55.0 million of indebtedness outstanding under the 2024 Credit Agreement for which it was obligated to pay in connection with the completion of the Company’s IPO and approximately $5.8 million in fees consisting of a 3.0% exit fee and a 3.0% early prepayment fee due under the 2021 Credit Agreement, as amended.

On August 22, 2025, the Company prepaid in full all outstanding amounts under, and terminated, the 2024 Credit Agreement, in the aggregate principal amount of $60.1 million plus accrued interest of $1.0 million. The Company did not incur exit or prepayment fees in connection with the termination of the 2024 Credit Agreement.

Interest

During its term, the 2024 Term Loan bore interest at a floating per annum rate in an amount equal to the sum of (i) 7.0% (or 6.0% if the alternative base rate (“ABR”) was in effect) plus (ii) the greater of (x) the forward-looking term rate based on the Secured Overnight Financing Rate (“SOFR”) for a respective tenor in effect on such day (or the alternative base rate, if applicable), and (y) 2.0%. The ABR equaled the sum of (i) 6.0% plus (ii) the greater of (1) the Wall Street Journal Prime Rate, plus 0.5%, (2) the Federal Reserve Bank of New York rate plus 0.5% or (3) the CBA Term SOFR for one month tenor plus 1.0%. The Company had an option to pay interest in-kind at the rate equal to the cash interest rate plus 1.0%.

Debt Issuance Costs and Debt Discount

Debt issuance costs include third-party costs incurred in connection with the original Credit Agreement. Debt discount includes fees paid to the lender, warrants issued to the lender and the embedded derivative liability as described below.

In connection with the conversion of $23.0 million of principal under the 2024 Term Loan to 2025 Convertible Notes under Amendment No. 1 to the 2024 Credit Agreement in January 2025, $239,000 of pro-rata debt discount under the 2024 Term Loan was reclassified as a debt discount under the 2025 Convertible Notes.

Prior to the term loan repayment in August 2025, the debt issuance costs and debt discount were classified as an offset to the Term Loan on the condensed consolidated balance sheets, and was accreted over the loan term using the effective interest method.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 470
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/470/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
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-Paragraph 1C
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
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-Paragraph 1I
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Section 50
-Paragraph 1I
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

+ Details

Leases (Tables)

3 Months Ended

Mar. 31, 2026

Leases [Abstract]

Schedule of Operating Lease Costs



	Three Months Ended March 31,
	2026		2025
Operating lease cost	$	1,448	$	1,251
Variable lease cost		339		363
Total lease cost	$	1,787	$	1,614

Summary of Aggregate Lease Payments


Year Ending December 31:	Amount
2026	$	5,044
2027		6,846
2028		7,066
2029		6,811
2030		5,150
2031 and after		696
Total minimum lease payments		31,613
Less: Amount of lease payments representing interest		5,264
Present value of future minimum lease payments	$	26,349
Less: Current lease liabilities		6,382
Long-term lease liabilities	$	19,967

Schedule of Additional Information Related to Operating Leases



	March 31,		December 31,
	2026		2025
Right-of-use asset	$	14,407	$	17,488
Weighted average remaining lease term (years)		4.5		4.3
Weighted average discount rate (percent)		8.7%		8.6%

Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2026

Balance Sheet Components [Abstract]

Summary of Available-for-sale Investments and Restricted Cash


	March 31, 2026
		Amortized		Gross Unrealized				Estimated
	Cost		Gains		Losses			Fair Value
Assets
Money market funds, included in cash equivalents	$	1,348	$	—	$	—	$	1,348
Money market funds, included in restricted cash, non-current		4,702		—		—		4,702
U.S. government securities		81,500		—		(78)		81,422
U.S. treasury bills		19,864		1		—		19,865
Corporate bonds/notes		63,517		—		(153)		63,364
Agency bonds/notes		44,137		—		(108)		44,029
Asset-backed securities		21,638		—		(25)		21,613
Commercial paper		4,935		—		(1)		4,934
Total	$	241,641	$	1	$	(365)	$	241,277

Classified as:
Cash equivalents							$	1,348
Short-term investments								138,645
Long-term investments								96,582
Restricted cash								4,702
Total							$	241,277

	December 31, 2025
		Amortized		Gross Unrealized				Estimated
	Cost		Gains		Losses			Fair Value
Assets
Money market funds, included in cash equivalents	$	27,806	$	—	$	—	$	27,806
Money market funds, included in restricted cash, non-current		4,709		—		—		4,709
U.S. government securities		81,385		94		—		81,479
U.S. treasury bills		39,568		25				39,593
Corporate bonds/notes		57,564		19		(12)		57,571
Agency bonds/notes		25,147		7		(3)		25,151
Asset-backed securities		21,689		22		—		21,711
Commercial paper		9,868		2		—		9,870
Total	$	267,736	$	169	$	(15)	$	267,890

Classified as:
Cash equivalents							$	27,806
Short-term investments								132,010
Long-term investments								103,365
Restricted cash								4,709
Total							$	267,890

Summary of Fair Value of Cash Equivalents and Available-for-sale Investments Classified by Maturity


	March 31, 2026		December 31, 2025
Amounts maturing within one year	$	139,993	$	159,816
Amounts maturing after one year through two years		96,582		103,365
Total	$	236,575	$	263,181

Schedule of Available-for-sale Investments in an Unrealized Loss Position


	March 31, 2026				December 31, 2025
	Less than 12 months				Less than 12 months
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Assets
U.S. government securities	$	566	$	(78)	$	—	$	—
Corporate bonds/notes		413		(153)		26,716		(12)
Agency bonds/notes		389		(108)		3,995		(3)
Asset-backed securities		47		(25)		—		—
Commercial paper		—		(1)		—		—
Total	$	1,415	$	(365)	$	30,711	$	(15)

Schedule of Allowance for Credit Loss



	March 31,		December 31,
	2026		2025
Balance at beginning of period	$	626	$	814
Additions		—		—
Write-offs		—		(188)
Balance at end of period	$	626	$	626

Summary of Prepaid Expenses and Other Current Assets




	March 31,		December 31,
	2026		2025
Prepaid expenses	$	8,313	$	5,964
Contract costs, current		8,202		6,669
Other		1,472		1,442
Total prepaid expenses and other current assets	$	17,987	$	14,075

Schedule of Property and Equipment, Net



	March 31,		December 31,
	2026		2025
Property and equipment at cost:
Computer equipment and software	$	4,277	$	4,223
Furniture, fixtures and equipment		2,280		2,114
Capitalized internal-use software		13,624		12,529
Leasehold improvements		2,095		2,086
Construction in progress		1,481		140
Total property and equipment		23,757		21,092
Less: Accumulated depreciation and amortization		(13,928)		(12,505)
Property and equipment, net	$	9,829	$	8,587

Schedule of Other Non-Current Assets



	March 31,		December 31,
	2026		2025
Contract costs, net	$	5,071	$	4,260
Other		1,604		839
Total other non-current assets	$	6,675	$	5,099

Schedule of Accrued Expenses and Other Current Liabilities



	March 31,		December 31,
	2026		2025
Accrued payroll and related expenses	$	19,762	$	28,150
Customer contract and rebate liabilities		1,583		1,162
Accrued royalty		1,049		864
Accrued professional fees		821		627
Accrued clinical trial expenses		1,118		550
Other		1,553		1,926
	$	25,886	$	33,279

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for credit losses	$ 626	$ 626
Preferred shares, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred shares, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common shares, par value (in dollars per share)	$ 0.001	$ 0.001
Common shares, shares authorized (in shares)	250,000,000	250,000,000
Common shares, shares issued (in shares)	86,105,290	85,280,597
Common shares, shares outstanding (in shares)	86,105,290	85,280,597

Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Redeemable Convertible Preferred Stock [Member]	Total
Beginning balance (in shares) at Dec. 31, 2024					122,231,454
Beginning balance at Dec. 31, 2024					$ 768,566
Ending balance (in shares) at Mar. 31, 2025					122,231,454
Ending balance at Mar. 31, 2025					$ 768,566
Beginning balance (in shares) at Dec. 31, 2024	6,122,048
Beginning balance at Dec. 31, 2024	$ 6	$ 112,241	$ (772)	$ (970,959)		$ (859,484)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	130,813
Issuance of common stock upon exercise of stock options		578				578
Stock-based compensation expense		2,492				2,492
Foreign currency translation gain (loss)			(236)			(236)
Net loss				(32,345)		(32,345)
Ending balance (in shares) at Mar. 31, 2025	6,252,861
Ending balance at Mar. 31, 2025	$ 6	115,311	(1,008)	(1,003,304)		$ (888,995)
Beginning balance (in shares) at Dec. 31, 2025	85,280,597					85,280,597
Beginning balance at Dec. 31, 2025	$ 85	1,388,737	(425)	(1,087,750)		$ 300,647
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	592,387					592,387
Issuance of common stock upon exercise of stock options	$ 1	3,341				$ 3,342
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for taxes (in shares)	28,740
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for taxes		(473)				(473)
Issuance of common stock under employee stock purchase plan (in shares)	203,566
Issuance of common stock under employee stock purchase plan		3,288				3,288
Stock-based compensation expense		6,554				6,554
Unrealized loss on investments, net			(522)			(522)
Foreign currency translation gain (loss)			262			262
Net loss				(27,380)		$ (27,380)
Ending balance (in shares) at Mar. 31, 2026	86,105,290					86,105,290
Ending balance at Mar. 31, 2026	$ 86	$ 1,401,447	$ (685)	$ (1,115,130)		$ 285,718

Balance Sheet Components (Schedule of Property and Equipment, Net) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 23,757	$ 21,092
Less: Accumulated depreciation and amortization	(13,928)	(12,505)
Property and equipment, net	9,829	8,587
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	4,277	4,223
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	2,280	2,114
Capitalized Internal-Use Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	13,624	12,529
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	2,095	2,086
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,481	$ 140

Fair Value Measurement (Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	$ 241,277	$ 267,890
Level 1 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	6,050	32,515
Level 2 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	235,227	235,375
Money Market Funds Included In Cash Equivalents [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	1,348	27,806
Money Market Funds Included In Cash Equivalents [Member] \| Level 1 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	1,348	27,806
Money Market Funds Included In Restricted Cash, Noncurrent [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	4,702	4,709
Money Market Funds Included In Restricted Cash, Noncurrent [Member] \| Level 1 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	4,702	4,709
U.S. Government Securities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	81,422	81,479
U.S. Government Securities [Member] \| Level 2 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	81,422	81,479
U.S. Treasury Bills [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	19,865	39,593
U.S. Treasury Bills [Member] \| Level 2 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	19,865	39,593
Corporate Bonds/Notes [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	63,364	57,571
Corporate Bonds/Notes [Member] \| Level 2 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	63,364	57,571
Agency Bonds/Notes [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	44,029	25,151
Agency Bonds/Notes [Member] \| Level 2 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	44,029	25,151
Asset-Backed Securities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	21,613	21,711
Asset-Backed Securities [Member] \| Level 2 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	21,613	21,711
Commercial Paper [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	4,934	9,870
Commercial Paper [Member] \| Level 2 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Assets	$ 4,934	$ 9,870

Business Overview (Narrative) (Details) $ / shares in Units, $ in Thousands	Aug. 11, 2025 USD ($) $ / shares shares	Jul. 31, 2025	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Business Overview [Line Items]
Stock split ratio		0.3425
Accumulated deficit			$ (1,115,130)	$ (1,087,750)
Cash and cash equivalents and investments in available-for-sale securities			$ 254,900
IPO [Member]
Business Overview [Line Items]
Shares issued \| shares	19,166,667
Shares issued, price per share \| $ / shares	$ 19.00
Gross proceeds from issuance of shares	$ 364,200
Payment of stock issuance costs	$ 31,800
Underwriter [Member]
Business Overview [Line Items]
Shares issued \| shares	2,500,000

Derivative Liability (Tables)

3 Months Ended

Mar. 31, 2026

Derivative Liability [Abstract]

Schedule of Assumptions Used in Determining Fair Value Derivative Liability



	March 26, 2025	January 31, 2025
Debt yield	7.0%	7.0%
Probability of IPO	75.0%	60.0%
Event Date of IPO	5/9/2025	5/5/2025
Probability of change of control	10.0%	20.0%
Event date of change of control	3/26/2026	1/31/2026
Discount rate	63.7%	31.3%

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2026	Apr. 30, 2026
Entity Addresses [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Document Transition Report	false
Entity File Number	001-42790
Registrant Name	Heartflow, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-0506743
Entity Address, Address Line One	135 Main Street, Suite 1000
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94105
City Area Code	650
Local Phone Number	241-1221
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	HTFL
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		86,240,828
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001464521
Amendment Flag	false
Former Address [Member]
Entity Addresses [Line Items]
Entity Address, Address Line One	331 E. Evelyn Avenue
Entity Address, City or Town	Mountain View
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94041

Business Overview (Policies)

3 Months Ended

Mar. 31, 2026

Business Overview [Abstract]

Description of Business

Heartflow, Inc. (the “Company”) was incorporated in the state of Delaware in July 2007.

The Company’s headquarters is located in San Francisco, California, and the Company also has offices in Mountain View, Rohnert Park and Santa Rosa, California, Austin, Texas, and Tokyo, Japan.

The Company had the following wholly-owned subsidiaries as of March 31, 2026:


Entity Name		Country of Incorporation
HeartFlow Japan G.K.		Japan
HeartFlow U.K. Ltd		United Kingdom

Effective November 2025, HeartFlow Technology U.K. Limited, a wholly-owned subsidiary in the United Kingdom, was dissolved.

Convertible Notes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended
	Aug. 11, 2025	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Mar. 26, 2025	Jan. 31, 2025
Line of Credit Facility [Line Items]
Proceeds from convertible notes offering, net of issuance costs			$ 73,860
Conversion price, discount percentage	20.00%
Derivative liability	$ 24,600				$ 20,800	$ 11,100
2025 Convertible Notes [Member]
Line of Credit Facility [Line Items]
Debt instrument, aggregate amount			98,300
Conversion of convertible notes into shares	6,470,743
Proceeds from convertible notes offering, net of issuance costs				$ 72,800
Debt issuance costs				$ 1,200
Debt instrument, term		48 months
Common stock converted (in dollars per share)	$ 15.20
Conversion price, discount percentage	20.00%
Derivative liability			20,800			$ 11,100
Debt discount and debt issuances costs reclassified to additional paid-in-capital	$ 28,800
2025 Convertible Promissory Notes, Settled in Cash [Member]
Line of Credit Facility [Line Items]
Debt instrument, aggregate amount			74,000
2025 Convertible Promissory Notes, Settled in Lieu of Cash [Member]
Line of Credit Facility [Line Items]
Debt instrument, issued on employee-based compensation			1,300
2025 Convertible Promissory Notes, Issued From Conversion Of Principal Under 2024 Term Loan [Member]
Line of Credit Facility [Line Items]
Debt conversion, converted instrument, amount			$ 23,000

Stockholders' Equity (Schedule Of Common Stock Reserve For Issuance On Converted Basis) (Details) - shares	Mar. 31, 2026	Dec. 31, 2025
Class of Stock [Line Items]
Common stock reserved for issuance (in shares)	23,716,137	24,996,827
Options to Purchase Common Stock [Member]
Class of Stock [Line Items]
Common stock reserved for issuance (in shares)	10,227,211	10,003,254
Restricted Stock Units [Member]
Class of Stock [Line Items]
Common stock reserved for issuance (in shares)	1,840,421	907,703
Shares Reserved for Issuance Under the Company’s Equity Plans [Member]
Class of Stock [Line Items]
Common stock reserved for issuance (in shares)	11,648,505	14,085,870

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2026

Summary of Significant Accounting Policies [Abstract]

Schedule of Significant Expense Categories of Reporting Segment


	Three Months Ended
	March 31,
	2026		2025
Revenue	$	52,587	$	37,205
Less⁽¹⁾:
Cost of revenue		10,423		9,264
Research and development		21,620		13,924
Selling, general and administrative expenses:
Sales and marketing		29,956		21,635
General and administrative		12,610		9,884
Asset impairment charge		7,482		—
Loss from operations		(29,504)		(17,502)
Other income (expense), net⁽²)		2,147		(14,843)
Provision for income taxes		(23)		—
Segment net loss	$	(27,380)	$	(32,345)

(1)The significant expense categories and amounts align with the segment-level information that is regularly provided to the CODM.

Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash



	March 31,
	2026		2025
Cash and cash equivalents	$	19,671	$	109,786
Restricted cash		4,702		4,475
Total cash, cash equivalents and restricted cash	$	24,373	$	114,261

Balance Sheet Components (Schedule of Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Components [Abstract]
Accrued payroll and related expenses	$ 19,762	$ 28,150
Customer contract and rebate liabilities	1,583	1,162
Accrued royalty	1,049	864
Accrued professional fees	821	627
Accrued clinical trial expenses	1,118	550
Other	1,553	1,926
Total accrued expenses and other current liabilities	$ 25,886	$ 33,279

Subsequent Events

3 Months Ended

Mar. 31, 2026

Subsequent Events [Abstract]

Subsequent Events

18. Subsequent Events

Patent Litigation

On April 13, 2026, the Company filed a patent infringement lawsuit against Cleerly, Inc. in the United States District Court for the Eastern District of Texas. The complaint seeks permanent injunctive relief and damages arising from Cleerly’s unauthorized and continued use of Heartflow’s patented technology. Heartflow asserts that Cleerly’s Ischemia, Plaque Analysis, and Compare products infringe six of Heartflow’s patents with priority dates from 2012 to 2018, protecting Heartflow innovations developed years before the introduction of any Cleerly product.

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2026

Summary of Significant Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Basis of Presentation

Use of Estimates

Segment Information

consolidated basis for purposes of making operating decisions, allocating resources and evaluating financial performance.


	Three Months Ended
	March 31,
	2026		2025
Revenue	$	52,587	$	37,205
Less⁽¹⁾:
Cost of revenue		10,423		9,264
Research and development		21,620		13,924
Selling, general and administrative expenses:
Sales and marketing		29,956		21,635
General and administrative		12,610		9,884
Asset impairment charge		7,482		—
Loss from operations		(29,504)		(17,502)
Other income (expense), net⁽²)		2,147		(14,843)
Provision for income taxes		(23)		—
Segment net loss	$	(27,380)	$	(32,345)

(1)The significant expense categories and amounts align with the segment-level information that is regularly provided to the CODM.

The Company derives revenue and has long-lived assets primarily in the United States of America. Revenue by geography is further described in Note 3.

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash to the total shown in the condensed consolidated statements of cash flows (in thousands):



	March 31,
	2026		2025
Cash and cash equivalents	$	19,671	$	109,786
Restricted cash		4,702		4,475
Total cash, cash equivalents and restricted cash	$	24,373	$	114,261

As of March 31, 2026 and December 31, 2025, restricted cash primarily represents deposits held as security in connection with the Company’s facility lease agreements.

Investments

Fair Value of Financial Instruments

Level 1 - Observable inputs, such as quoted prices in active markets for identical assets or liabilities;

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Concentration of Credit Risk and Significant Customers

No single customer represented more than 10% of the Company’s revenue during the three months ended March 31, 2026 and 2025.

No single customer represented more than 10% of the Company’s accounts receivable as of March 31, 2026 and December 31, 2025.

Impairment of Long-Lived Assets

Leases

Revenue Recognition

The Company sells its Heartflow Platform to medical providers in the United States and in select international markets. The Company determines revenue recognition through the following steps:

•Identification of the contract, or contracts, with a customer;

•Identification of the performance obligations in the contract;

•Determination of the transaction price;

•Allocation of the transaction price to the performance obligations in the contract; and

•Recognition of revenue when, or as, the Company satisfies a performance obligation.

Unbilled Receivables

Contract Costs

Remaining Performance Obligations

Contract Liabilities

Cost of Revenue

Stock-Based Compensation

Income Taxes

Comprehensive Loss

Comprehensive loss is comprised of net loss, changes in unrealized gains and losses on investments classified as available-for-sale and foreign currency translation gains and losses.

Foreign Currency

Net Loss Per Share

Recent Accounting Pronouncements

choose to early adopt any new or revised accounting standards whenever such early adoption is permitted for nonpublic companies.

Recently Adopted Accounting Pronouncements

Recent Accounting Pronouncements Not Yet Adopted

Leases

3 Months Ended

Mar. 31, 2026

Leases [Abstract]

Leases

6. Leases

The Company leases office space in Mountain View, Santa Rosa, San Francisco and Rohnert Park, California, Austin, Texas, and Tokyo, Japan.

Mountain View, California

In August 2021, the Company entered into a facility lease agreement for approximately 61,000 rentable square feet in Mountain View, California through August 2030. In connection with the lease, the Company established a standby letter of credit for the benefit of the landlord in the amount of $4.3 million in August 2021, which is classified as non-current restricted cash on the condensed consolidated balance sheets as of March 31, 2026 and December 31, 2025.

In March 2026, the Company entered into a sublease agreement (the “Sublease”) with a third-party subtenant to sublease its Mountain View, California facility. The initial term of the Sublease commenced in April 2026 and continues until August 2030, consistent with the remaining term of the Company’s Master Lease, with 52% occupancy of the facility beginning April 2026 and full occupancy by March 2027. The Sublease provides for an initial annual base rent of approximately $1.2 million, which increases annually up to a maximum annual base rent of approximately $2.4 million. The subtenant is obligated to pay its ratable portion of operating costs, annual tax costs and all utility costs attributable to the facility during the term of the Sublease. The subtenant will provide the Company with a letter of credit in the amount of $0.8 million in place of a security deposit. The Company evaluated the associated ROU asset and leasehold improvements for impairment as the substantially lower sublease income indicated that the carrying amount of such assets may not be recoverable. The Company compared the carrying value of the impacted assets to the fair value based on the Company’s estimate of discounted future cash flows to determine the impairment amount and recognized an asset impairment charge of $7.5 million during the three months ended March 31, 2026, of which $7.4 million was attributable to the ROU asset and $136,000 was attributable to leasehold improvements.

Santa Rosa, California

In October 2024, the Company entered into an agreement to sublease approximately 4,000 rentable square feet of office space in Santa Rosa, California for 29 months through March 2027. In connection with this sublease, the Company paid a security deposit of $8,000 and recorded an ROU asset and lease liability of $169,000.

San Francisco, California

In July 2025, the Company entered into an agreement to sublease approximately 8,100 rentable square feet of office space in San Francisco, California for 39 months through January 2029. In connection with this sublease, the Company paid a security deposit of $90,000 and recorded an ROU asset and lease liability of $1,254,000. On March 17, 2026, the Company amended the lease agreement to include an additional 5,018 rentable square feet and to extend the term for a period of 51 months through August 2030. The expansion effective date is expected to

commence in the second quarter of 2026. The average monthly lease payments are approximately $47,400 per month for the expansion period and $26,500 per month for the lease extension during the amended lease term. An additional security deposit of $62,000 is also required.

Rohnert Park, California

In December 2025, the Company entered into a facility lease agreement for approximately 13,100 rentable square feet of office space in Rohnert Park, California for 63 months through September 2031, with the option to extend for one additional three-year period. In connection with the lease, the Company paid a security deposit of $39,000 and recorded an ROU asset and lease liability of $2.8 million upon lease commencement in the first quarter of 2026. The lease also provides for a tenant improvement allowance of $173,000.

Austin, Texas

In September 2025, the Company amended the lease for its Austin, Texas facility, which provides for approximately 26,000 square feet of space, to extend the lease term an additional 12 months through December 2026 and recorded an ROU asset and lease liability of $561,000 in connection with the lease extension. In January 2026, the Company amended the lease to extend the lease term an additional 51 months through March 2031, with the option to extend for two additional three-year periods. In connection with the lease amendment, the Company recorded an ROU asset and lease liability of $2.5 million. The lease amendment also provided for a tenant improvement allowance of $71,000. A security deposit of $150,000 was recorded as non-current restricted cash as of March 31, 2026 and December 31, 2025, on the condensed consolidated balance sheets related to this lease.

Tokyo, Japan

The Company had one non-cancellable operating lease for its facility in Tokyo, Japan, which was set to expire in November 2024. In April 2024, the Company entered into an agreement to extend the lease for an additional three years through November 2027. In connection with the amended lease agreement, the Company recorded an ROU asset and lease liability of $420,000.

Operating lease cost consisted of the following (in thousands):



	Three Months Ended March 31,
	2026		2025
Operating lease cost	$	1,448	$	1,251
Variable lease cost		339		363
Total lease cost	$	1,787	$	1,614

Cash paid for amounts included in the measurement of operating lease liabilities was $1.5 million and $1.4 million during the three months ended March 31, 2026 and 2025, respectively.

The following table summarizes the maturities of the aggregate lease payments under the Company’s operating lease liabilities as of March 31, 2026 (in thousands):


Year Ending December 31:	Amount
2026	$	5,044
2027		6,846
2028		7,066
2029		6,811
2030		5,150
2031 and after		696
Total minimum lease payments		31,613
Less: Amount of lease payments representing interest		5,264
Present value of future minimum lease payments	$	26,349
Less: Current lease liabilities		6,382
Long-term lease liabilities	$	19,967

The following table summarizes additional information related to the Company’s operating leases (in thousands, except weighted-average data):



	March 31,		December 31,
	2026		2025
Right-of-use asset	$	14,407	$	17,488
Weighted average remaining lease term (years)		4.5		4.3
Weighted average discount rate (percent)		8.7%		8.6%

Leases (Schedule of Additional Information Related to Operating Leases) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Leases [Abstract]
Right-of-use asset	$ 14,407	$ 17,488
Weighted-average remaining lease term (years)	4 years 6 months	4 years 3 months 18 days
Weighted-average discount rate (percent)	8.70%	8.60%

Employee Retirement Plan (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Employee Retirement Plan [Abstract]
Maximum contribution by participants (as a percentage)	100.00%
Company's contribution to each participating employee's eligible compensation (as percent)	4.00%
Matching contributions	$ 1,300,000	$ 688,000

Stock-Based Compensation Plans

3 Months Ended

Mar. 31, 2026

Stock-Based Compensation Plans [Abstract]

Stock-Based Compensation Plans

14. Stock-Based Compensation Plans

In 2009, the Company adopted its 2009 Equity Incentive Plan which provided for the grant of stock options to the Company’s employees, members of the Board of Directors and consultants. Effective upon the Company’s IPO in August 2025, the Company’s Board of Directors approved the termination of the 2009 Equity Incentive Plan and the adoption of the 2025 Performance Incentive Plan (“2025 Plan”). Options granted under the 2025 Plan may be either incentive stock options (“ISOs”) or nonqualified stock options (“NSOs”). ISOs may be granted only to employees. NSOs, Stock Appreciation Rights, Restricted Stock, and Restricted Stock Units (“RSUs”) may be granted to employees, members of the Board of Directors and consultants. A total of 17,346,193 shares of common stock were initially reserved for issuance pursuant to the 2025 Plan. In addition, the shares reserved for issuance under the 2025 Plan will also include shares reserved but not issued under the 2009 Equity Incentive Plan, plus any share awards granted under the 2009 Equity Incentive Plan that expire or terminate without having been exercised in full or that are forfeited or repurchased. In addition, the number of shares available for issuance under the 2025 Plan will also include an annual increase on the first day of each fiscal year beginning in fiscal 2026, equal to or greater than (i) 5% of the outstanding shares of common stock as of the last day of the immediately preceding fiscal year less any Board of Directors-approved increase(s) during the preceding fiscal year; or (ii) an amount as determined by the Board of Directors.

Options under the 2009 Equity Incentive Plan and 2025 Plan have a term of ten years from the grant date. The option exercise price will be determined by the Board of Directors, but will be no less than 100% of the fair market value per share on the date of grant. In addition, in the case of an ISO granted to an employee who owns stock representing more than 10% of the voting power of all classes of stock of the Company, the per share exercise price will be no less than 110% of the fair market value per share on the date of grant. Through March 31, 2026 and December 31, 2025, options granted generally vest over (i) four years with 25% vesting on the first anniversary of the issuance date and 1/48th per month thereafter or (ii) vesting monthly in equal installments over four years.

Stock option activity under the Company’s 2009 Equity Incentive Plan and 2025 Plan is set forth below (in thousands, except share and per share amounts):


				Weighted-
		Weighted-		Average
		Average		Remaining		Aggregate
	Number of	Exercise		Contractual		Intrinsic
	Options	Price		Life (years)		Value
Balance at December 31, 2025	10,003,254	$	8.05		7.83	$	211,109
Options granted	913,696		27.74
Options exercised	(592,387)	$	5.64
Options forfeited	(97,352)	$	8.54
Balance at March 31, 2026	10,227,211	$	9.94		7.90	$	150,611
Vested and exercisable, March 31, 2026	4,405,075	$	5.62		6.83	$	82,463
Vested and expected to vest, March 31, 2026	10,227,211	$	9.94		7.90	$	150,611

The weighted-average grant date fair value of options granted during the three months ended March 31, 2026 and 2025 was $15.88 and $7.10 per share, respectively.

The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock options and the fair value of the Company’s common stock for stock options that were in-the-money at each reporting period. The aggregate intrinsic value of stock options exercised during the three months ended March 31, 2026 was $12.2 million and $1.1 million, respectively.

Restricted Stock Units

In August 2025, the Company began granting RSUs under the 2025 Plan. RSUs generally vest over four years in equal quarterly increments. The fair value of RSUs is based on the Company’s closing stock price on the date of grant. A summary of RSUs activity is set forth below:



			Weighted-
	Number of		Average
	Restricted Stock		Grant Date
	Units		Fair Value
Unvested balance at December 31, 2025		907,703	$	20
Awards granted		1,019,499	$	27.22
Awards vested		(45,779)	$	19
Awards canceled		(41,002)	$	21.48
Unvested balance at March 31, 2026		1,840,421	$	24.15

2025 Employee Stock Purchase Plan

Effective upon the Company’s IPO in August 2025, the Board of Directors adopted the 2025 Employee Stock Purchase Plan (“2025 ESPP”), under which eligible employees are permitted to purchase common stock at a discount through payroll deductions. A total of 1,233,964 shares of common stock are reserved for issuance and will be increased on the first day of each fiscal year, beginning in 2026, by an amount equal to the lesser of (i) 1.0% of the issued and outstanding shares of common stock as of the last day of the immediately preceding fiscal year; or (ii) an amount as determined by the Board of Directors. The price of the common stock purchased will be the lower of 85% of the fair market value of the common stock at the beginning of an offering period or at the end of a purchase period. The 2025 ESPP is intended to qualify as an “employee stock purchase plan” within the meaning of Section 423 of the Internal Revenue Code of 1986, as amended (the “IRC”).

Stock-Based Compensation

The Company estimated the fair value of stock options using the Black-Scholes option-pricing model based on the following assumptions:



	Three Months Ended March 31,
	2026		2025
Expected life (in years)		6.00		6.00
Expected volatility		57.1%		55.0%-55.4%
Risk-free interest rate		3.9%		4.0%
Dividend yield		—%		—%

The Company estimated the fair value of the shares to be issued under the Company’s 2025 ESPP using the Black-Scholes option-pricing model based on the following assumptions:


	Three Months Ended March 31,
	2026
Expected life (in years)		0.5
Expected volatility		55.1%
Risk-free interest rate		3.7%
Dividend yield		—%

The significant assumptions used in these calculations are summarized as follows:

Fair value of common stock. Because there had been no public market for the Company’s common stock prior to the IPO, the fair value of common stock shares underlying stock options has historically been determined by the Board

of Directors at the time of option grant by considering an independent valuation performed by a third-party valuation firm as well as a number of objective and subjective factors, including a valuation of comparable companies, sales of convertible preferred stock to unrelated third parties, operating and financial performance, the lack of liquidity of capital stock and general and industry specific economic outlook, among other factors. The fair value of common stock was determined in accordance with applicable elements of the American Institute of Certified Public Accountants Practice Aid, Valuation of Privately-Held-Company Equity Securities Issued as Compensation. Subsequent to its IPO, the fair value of the underlying common stock is based on the closing price of the Company’s common stock on the Nasdaq Stock Market on the date of grant.

Expected term. The expected term of stock options represents the weighted-average period that the stock options are expected to remain outstanding. The Company does not have sufficient historical exercise and post-vesting termination activity to provide accurate data for estimating the expected term of options and has opted to use the “simplified method,” whereby the expected term equals the arithmetic average of the vesting term and the original contractual term of the option.

Expected volatility. As the Company was not publicly traded prior to the IPO and does not have sufficient trading history after the IPO, the expected volatility for the Company’s stock options was determined by using an average of historical volatilities of selected industry peers deemed to be comparable to the Company’s business corresponding to the expected term of the awards.

Risk-free interest rate. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for zero-coupon U.S. Treasury notes with maturities corresponding to the expected term of the awards.

Expected dividend yield. The expected dividend rate is zero as the Company currently has no history or expectation of declaring dividends on its common stock.

The Company also issues stock options with vesting based upon completion of performance goals. The fair value for these performance-based awards is recognized over the period during which the goals are to be achieved. Stock-based compensation expense recognized at fair value includes the impact of estimated probability that the goals would be achieved, which is assessed prior to the requisite service period for the specific goals.

Total stock-based compensation expense is as follows (in thousands):



	Three Months Ended
	March 31,
	2026		2025
Cost of revenue	$	166	$	57
Research and development		2,138		547
Selling, general and administrative		4,250		1,888
Total stock-based compensation expense	$	6,554	$	2,492

As of March 31, 2026, total unrecognized stock-based compensation costs related to unvested stock options was $40.9 million, which is expected to be recognized over a remaining weighted-average period of 3.31 years, a total of $42.4 million of unrecognized compensation costs related to unvested RSUs expected to be recognized over a period of approximately 3.75 years and $1.1 million of unrecognized compensation costs related to the ESPP, which is expected to be recognized over 0.44 years.

Employee Retirement Plan

3 Months Ended

Mar. 31, 2026

Employee Retirement Plan [Abstract]

Employee Retirement Plan

15. Employee Retirement Plan

The Company has a qualified retirement plan under section 401(k) of the IRC under which participants may contribute up to 100% of their eligible compensation, subject to maximum deferral limits specified by the IRC. The Company may make matching contributions of up to 4.0% of an employee’s eligible compensation, subject to conditions specified by the IRC. The Company’s matching contributions totaled $1.3 million and $688,000 during the three months ended March 31, 2026 and 2025, respectively.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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+ Details

Income Taxes (Narrative) (Details)	3 Months Ended
Income Taxes (Narrative) (Details)	Mar. 31, 2026	Mar. 31, 2025
Income Taxes [Abstract]
Effective income tax rate (as percent)	0.00%	0.00%

Income Taxes

3 Months Ended

Mar. 31, 2026

Income Taxes [Abstract]

Income Taxes

17. Income Taxes

The Company had an effective tax rate of 0% for the three months ended March 31, 2026 and 2025. The Company continues to incur operating losses.

During the three months ended March 31, 2026 and 2025, the Company has evaluated all available evidence, both positive and negative, including historical levels of income, expectations and risks associated with estimates of future taxable income, and has determined that it is more likely than not that its net deferred tax assets will not be realized. Due to uncertainties surrounding the realization of the deferred tax assets, the Company continues to maintain a full valuation allowance against its net deferred tax assets.

- Definition

The entire disclosure for income tax.

+ References

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+ Details

Balance Sheet Components (Summary of Prepaid Expenses and Other Current Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Components [Abstract]
Prepaid expenses	$ 8,313	$ 5,964
Contract costs, current	8,202	6,669
Other	1,472	1,442
Total prepaid expenses and other current assets	$ 17,987	$ 14,075

Balance Sheet Components (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Property, Plant and Equipment [Line Items]
Investments in an unrealized loss position greater than twelve months	$ 0		$ 0
Allowance for credit loss	0		$ 0
Stock-based compensation expense	6,554,000	$ 2,492,000
Amortization of capitalized internal-use software	1,100,000	1,000,000.0
Depreciation and amortization	$ 1,423,000	1,372,000
Weighted Average [Member]
Property, Plant and Equipment [Line Items]
Available-for-sale investments, maturity date	325 days		346 days
Capitalized Internal-Use Software [Member]
Property, Plant and Equipment [Line Items]
Capitalized internal use software costs	$ 1,100,000	936,000
Stock-based compensation expense	6,000	6,000
Property and Equipment, Excluding Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 359,000	$ 370,000

Derivative Liability

3 Months Ended

Mar. 31, 2026

Derivative Liability [Abstract]

Derivative Liability

13. Derivative Liability

2025 Convertible Notes

The 2025 Convertible Notes were determined to contain certain settlement features and conversion put options which require bifurcation and separate accounting as a single compound embedded derivative, as discussed in Note 9. The fair value of the derivative liability was recorded at the issuance dates as a debt discount and reduction to the carrying value of the 2025 Convertible Notes on the condensed consolidated balance sheets. The derivative liability is remeasured to fair value at each reporting period and the related changes in fair value are recorded on the condensed consolidated statements of operations and comprehensive loss.

The fair value of the derivative liability was estimated using a scenario-based analysis comparing the probability-weighted present value of the 2025 Convertible Notes with and without the bifurcated features. The Company used the Monte Carlo Simulation method to estimate the fair value of the derivative liability because it believes this technique is reflective of all significant assumption types and ranges of assumption inputs that market participants would likely consider in transactions involving compound embedded derivatives. The option pricing method was employed as part of a back-solve analysis for scenarios in which the Company was expected to raise another financing round. The Company also employed a waterfall analysis that allocated certain exit proceeds to its outstanding share classes for scenarios in which the Company was assumed to exit via change of control or IPO. The Company’s assumptions used in determining the issuance date fair value of the derivative liability is as follows:



	March 26, 2025	January 31, 2025
Debt yield	7.0%	7.0%
Probability of IPO	75.0%	60.0%
Event Date of IPO	5/9/2025	5/5/2025
Probability of change of control	10.0%	20.0%
Event date of change of control	3/26/2026	1/31/2026
Discount rate	63.7%	31.3%

The issuance date estimated fair values of the derivative liability was $11.1 million and $20.8 million in January and March 2025, respectively, which were recorded as debt discounts. The derivative liability was remeasured to fair value at the end of each reporting period and through the date of its conversion to common stock upon the Company’s IPO. The aggregate estimated fair value of the derivative liability at the time of conversion was $24.6 million, based on the 20% discount from the IPO price, which was reclassified to additional paid-in capital.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

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+ Details

Common Stock Warrant Liability

3 Months Ended

Mar. 31, 2026

Common Stock Warrant Liability [Abstract]

Common Stock Warrant Liability

12. Common Stock Warrant Liability

On October 22, 2025, Hayfin net exercised all common stock warrants outstanding for 1,646,317 shares of common stock. The common stock warrant liability was remeasured to fair value through the date of exercise, resulting in a loss of $43.9 million within the condensed consolidated statements of operations and comprehensive loss for the year ended December 31, 2025. The final fair value of $64.7 million was reclassified to stockholders’ equity on the date of exercise. As of March 31, 2026 and December 31, 2025, no warrants to purchase common stock were outstanding.

Leases (Schedule of Operating Lease Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Leases [Abstract]
Operating lease cost	$ 1,448	$ 1,251
Variable lease cost	339	363
Total lease cost	$ 1,787	$ 1,614

Revenue and Contract Balances (Schedule of Capitalized Contract Costs) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Capitalized Contract Costs [Roll Forward]
Balance at beginning of period	$ 10,929	$ 6,154
Contract costs capitalized	4,489	10,795
Contract costs amortized	(2,145)	(6,020)
Balance at end of period	$ 13,273	$ 10,929

Convertible Notes

3 Months Ended

Mar. 31, 2026

Convertible Notes [Abstract]

Convertible Notes

9. Convertible Notes

2025 Convertible Notes

In January and March 2025, the Company issued convertible promissory notes to Requisite Holders in the aggregate amount of $98.3 million, which was comprised of $74.0 million in principal amount of notes issued for cash consideration, $1.3 million in principal amount of notes issued in lieu of cash compensation to certain employees and $23.0 million in principal amount of notes issued from the conversion of principal under the 2024 Term Loan. Net cash proceeds was $72.8 million after deducting $1.2 million of debt issuance costs.

Prior to its conversion upon the Company’s IPO, the 2025 Convertible Notes were due and payable in full 48 months from the issue date and did not accrue interest for one year following the date of issuance. Upon completion of the Company’s IPO in August 2025, the 2025 Convertible Notes automatically converted into 6,470,743 shares of the Company’s common stock at $15.20 per share, which was a 20% discount to the IPO price.

Prior to its conversion upon the Company’s IPO, the 2025 Convertible Notes contained embedded derivative features, including conversion upon a change in control and automatic conversion upon completion of a qualified IPO, that were required to be bifurcated and accounted for separately as a single derivative instrument. The issuance date estimated fair values of the derivative liability was $11.1 million and $20.8 million in January and March 2025, respectively, which was accounted for as a debt discount. See Note 13 for additional information. The debt issuance costs and debt discount were classified as an offset to the 2025 Convertible Notes on the condensed consolidated balance sheets, and were accreted over the loan term using the effective interest method. Upon the closing of the Company’s IPO, the remaining unamortized debt discount and debt issuance costs of $28.8 million were reclassified to additional paid-in capital.

Revenue and Contract Balances (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Revenue and Contract Balances [Abstract]
Unbilled receivables	$ 835	$ 814

Balance Sheet Components

3 Months Ended

Mar. 31, 2026

Balance Sheet Components [Abstract]

Balance Sheet Components

5. Balance Sheet Components

Investments

The fair value of the Company’s available-for-sale investments and restricted cash as of March 31, 2026 and December 31, 2025 are as follows (in thousands):


	March 31, 2026
		Amortized		Gross Unrealized				Estimated
	Cost		Gains		Losses			Fair Value
Assets
Money market funds, included in cash equivalents	$	1,348	$	—	$	—	$	1,348
Money market funds, included in restricted cash, non-current		4,702		—		—		4,702
U.S. government securities		81,500		—		(78)		81,422
U.S. treasury bills		19,864		1		—		19,865
Corporate bonds/notes		63,517		—		(153)		63,364
Agency bonds/notes		44,137		—		(108)		44,029
Asset-backed securities		21,638		—		(25)		21,613
Commercial paper		4,935		—		(1)		4,934
Total	$	241,641	$	1	$	(365)	$	241,277

Classified as:
Cash equivalents							$	1,348
Short-term investments								138,645
Long-term investments								96,582
Restricted cash								4,702
Total							$	241,277

	December 31, 2025
		Amortized		Gross Unrealized				Estimated
	Cost		Gains		Losses			Fair Value
Assets
Money market funds, included in cash equivalents	$	27,806	$	—	$	—	$	27,806
Money market funds, included in restricted cash, non-current		4,709		—		—		4,709
U.S. government securities		81,385		94		—		81,479
U.S. treasury bills		39,568		25				39,593
Corporate bonds/notes		57,564		19		(12)		57,571
Agency bonds/notes		25,147		7		(3)		25,151
Asset-backed securities		21,689		22		—		21,711
Commercial paper		9,868		2		—		9,870
Total	$	267,736	$	169	$	(15)	$	267,890

Classified as:
Cash equivalents							$	27,806
Short-term investments								132,010
Long-term investments								103,365
Restricted cash								4,709
Total							$	267,890

The following table summarizes the fair value of the Company’s cash equivalents, and available-for-sale investments classified by maturity as of March 31, 2026 (in thousands):


	March 31, 2026		December 31, 2025
Amounts maturing within one year	$	139,993	$	159,816
Amounts maturing after one year through two years		96,582		103,365
Total	$	236,575	$	263,181

Available-for-sale investments held as of March 31, 2026 and December 31, 2025 had a weighted average days to maturity of 325 days and 346 days, respectively.

The following table presents the Company’s available-for-sale investments that were in an unrealized loss position as of March 31, 2026 and December 31, 2025 (in thousands):


	March 31, 2026				December 31, 2025
	Less than 12 months				Less than 12 months
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Assets
U.S. government securities	$	566	$	(78)	$	—	$	—
Corporate bonds/notes		413		(153)		26,716		(12)
Agency bonds/notes		389		(108)		3,995		(3)
Asset-backed securities		47		(25)		—		—
Commercial paper		—		(1)		—		—
Total	$	1,415	$	(365)	$	30,711	$	(15)

As of March 31, 2026 and December 31, 2025, unrealized losses on the Company’s available-for-sale investments were primarily attributable to changes in interest rates and were not due to credit risk. The Company intends to hold these investments to maturity and no allowance for credit loss was recorded as of March 31, 2026 and December 31, 2025. There were no available-for-sale investments in an unrealized loss position greater than twelve months as of March 31, 2026 or December 31, 2025.

Allowance for Credit Losses

The following table presents a reconciliation of the allowance for credit losses (in thousands):



	March 31,		December 31,
	2026		2025
Balance at beginning of period	$	626	$	814
Additions		—		—
Write-offs		—		(188)
Balance at end of period	$	626	$	626

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets are comprised of the following (in thousands):




	March 31,		December 31,
	2026		2025
Prepaid expenses	$	8,313	$	5,964
Contract costs, current		8,202		6,669
Other		1,472		1,442
Total prepaid expenses and other current assets	$	17,987	$	14,075

Property and equipment, net

Property and equipment consisted of the following (in thousands):



	March 31,		December 31,
	2026		2025
Property and equipment at cost:
Computer equipment and software	$	4,277	$	4,223
Furniture, fixtures and equipment		2,280		2,114
Capitalized internal-use software		13,624		12,529
Leasehold improvements		2,095		2,086
Construction in progress		1,481		140
Total property and equipment		23,757		21,092
Less: Accumulated depreciation and amortization		(13,928)		(12,505)
Property and equipment, net	$	9,829	$	8,587

The Company capitalized certain internal-use software costs totaling $1.1 million and $936,000, including stock-based compensation of $6,000 and $6,000, related to internal-use software development efforts, during the three months ended March 31, 2026 and 2025, respectively. Amortization of capitalized internal-use software totaled $1.1 million and $1.0 million for the three months ended March 31, 2026 and 2025, respectively.

Depreciation and amortization expense related to property and equipment, excluding capitalized internal-use software, was $359,000 and $370,000 for three months ended March 31, 2026 and 2025, respectively.

Other Non-Current Assets

Other non-current assets are comprised of the following (in thousands):



	March 31,		December 31,
	2026		2025
Contract costs, net	$	5,071	$	4,260
Other		1,604		839
Total other non-current assets	$	6,675	$	5,099

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities are comprised of the following (in thousands):



	March 31,		December 31,
	2026		2025
Accrued payroll and related expenses	$	19,762	$	28,150
Customer contract and rebate liabilities		1,583		1,162
Accrued royalty		1,049		864
Accrued professional fees		821		627
Accrued clinical trial expenses		1,118		550
Other		1,553		1,926
	$	25,886	$	33,279

Stock-Based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2026

Stock-Based Compensation Plans [Abstract]

Schedule of Stock Option Activity


				Weighted-
		Weighted-		Average
		Average		Remaining		Aggregate
	Number of	Exercise		Contractual		Intrinsic
	Options	Price		Life (years)		Value
Balance at December 31, 2025	10,003,254	$	8.05		7.83	$	211,109
Options granted	913,696		27.74
Options exercised	(592,387)	$	5.64
Options forfeited	(97,352)	$	8.54
Balance at March 31, 2026	10,227,211	$	9.94		7.90	$	150,611
Vested and exercisable, March 31, 2026	4,405,075	$	5.62		6.83	$	82,463
Vested and expected to vest, March 31, 2026	10,227,211	$	9.94		7.90	$	150,611

Summary of RSU Activity



			Weighted-
	Number of		Average
	Restricted Stock		Grant Date
	Units		Fair Value
Unvested balance at December 31, 2025		907,703	$	20
Awards granted		1,019,499	$	27.22
Awards vested		(45,779)	$	19
Awards canceled		(41,002)	$	21.48
Unvested balance at March 31, 2026		1,840,421	$	24.15

Summary of Information Amount Stock Options Outstanding



	Three Months Ended March 31,
	2026		2025
Expected life (in years)		6.00		6.00
Expected volatility		57.1%		55.0%-55.4%
Risk-free interest rate		3.9%		4.0%
Dividend yield		—%		—%

Summary of Estimated Fair Value of Stock Options


	Three Months Ended March 31,
	2026
Expected life (in years)		0.5
Expected volatility		55.1%
Risk-free interest rate		3.7%
Dividend yield		—%

Schedule of Stock-Based Compensation Expense



	Three Months Ended
	March 31,
	2026		2025
Cost of revenue	$	166	$	57
Research and development		2,138		547
Selling, general and administrative		4,250		1,888
Total stock-based compensation expense	$	6,554	$	2,492

Term Loan (Debt Issuance Costs and Debt Discount) (Details) - 2025 Convertible Notes [Member] $ in Thousands	Jan. 24, 2025 USD ($)
Debt Instrument [Line Items]
Notes converted	$ 23,000
Debt instrument, pro-rata debt discount	$ 239

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Stockholders' Equity (Narrative) (Details) - USD ($)	3 Months Ended
Stockholders' Equity (Narrative) (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Stockholders' Equity [Abstract]
Preferred shares, shares authorized (in shares)	50,000,000	50,000,000
Preferred shares, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common shares, shares authorized (in shares)	250,000,000	250,000,000
Common shares, par value (in dollars per share)	$ 0.001	$ 0.001
Common shares, shares issued (in shares)	86,105,290	85,280,597
Common shares, shares outstanding (in shares)	86,105,290	85,280,597
Dividends declared	$ 0
Common stock, voting rights	Each share of common stock is entitled to one vote.