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Warrants, Redeemable Convertible Preferred Stock and Stockholders' Equity (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Dec. 31, 2025
Equity [Abstract] |  |
Schedule of Common Stock, Capital Shares Reserved for Conversion or Exercise | At March 31, 2026, the Company has reserved an aggregate of 6,239,595 shares of common stock for the conversion, exercise or issuance, as applicable, of the following outstanding securities:
Restricted stock units |  |  | 2,074,375 |
Stock options and employee stock purchase plan |  |  | 4,165,220 |
Total shares |  |  | 6,239,595 |
| At December 31, 2025, the Company has reserved an aggregate of 4,752,658 shares of common stock for the conversion, exercise or issuance, as applicable, of the following outstanding securities:
Common warrants |  |  | 244,425 |
Restricted stock units |  |  | 1,497,340 |
Stock options and employee stock purchase program |  |  | 4,322,986 |
Total shares |  |  | 6,064,751 |
Schedule of Redeemable Convertible Preferred Stock |  | See the table below for a roll forward of the total preferred stock from January 1, 2024 to December 31, 2024 and January 1, 2025 to December 31, 2025, which details the total redeemable convertible preferred stock presented in the consolidated statements of changes in redeemable convertible preferred stock and stockholders’ equity (deficit) (in thousands, except share amounts):
|  | Series Seed Redeemable convertible preferred stock |  |  | Series A Redeemable convertible preferred stock |  |  | Series B Redeemable convertible preferred stock |  |  | Series C Redeemable convertible preferred stock |  |  | Series D Redeemable convertible preferred stock |  |  | Series E Redeemable convertible preferred stock |  |  | Series F Redeemable convertible preferred stock |  |  | Series F-1 Redeemable convertible preferred stock |  |  | Series G Redeemable convertible preferred stock |
|  | Shares |  |  | Amount |  |  | Shares |  |  | Amount |  |  | Shares |  |  | Amount |  |  | Shares |  |  | Amount |  |  | Shares |  |  | Amount |  |  | Shares |  |  | Amount |  |  | Shares |  |  | Amount |  |  | Shares |  |  | Amount |  |  | Shares |  |  | Amount |
Balance at January 1, 2024 |  |  | 5,045,368 |  |  | $ | 2,473 |  |  |  | 8,255,614 |  |  | $ | 5,179 |  |  |  | 18,894,315 |  |  | $ | 10,827 |  |  |  | 42,890,840 |  |  | $ | 24,908 |  |  |  | 39,656,811 |  |  | $ | 33,411 |  |  |  | 29,019,153 |  |  | $ | 29,738 |  |  |  | 74,840,147 |  |  | $ | 132,975 |  |  |  | 23,664,027 |  |  | $ | 49,392 |  |  |  | 34,972,704 |  |  | $ | 31,258 |
Issuance of Series G preferred stock, net |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 64,257,179 |  |  |  | 57,989 |
Balance at December 31, 2024 |  |  | 5,045,368 |  |  | $ | 2,473 |  |  |  | 8,255,614 |  |  | $ | 5,179 |  |  |  | 18,894,315 |  |  | $ | 10,827 |  |  |  | 42,890,840 |  |  | $ | 24,908 |  |  |  | 39,656,811 |  |  | $ | 33,411 |  |  |  | 29,019,153 |  |  | $ | 29,738 |  |  |  | 74,840,147 |  |  | $ | 132,975 |  |  |  | 23,664,027 |  |  | $ | 49,392 |  |  |  | 99,229,883 |  |  | $ | 89,247 |
Balance at January 1, 2025 |  |  | 5,045,368 |  |  | $ | 2,473 |  |  |  | 8,255,614 |  |  | $ | 5,179 |  |  |  | 18,894,315 |  |  | $ | 10,827 |  |  |  | 42,890,840 |  |  | $ | 24,908 |  |  |  | 39,656,811 |  |  | $ | 33,411 |  |  |  | 29,019,153 |  |  | $ | 29,738 |  |  |  | 74,840,147 |  |  | $ | 132,975 |  |  |  | 23,664,027 |  |  | $ | 49,392 |  |  |  | 99,229,883 |  |  | $ | 89,247 |
Conversion of preferred stock to common stock upon IPO |  |  | (5,045,368 | ) |  |  | (2,473 | ) |  |  | (8,255,614 | ) |  |  | (5,179 | ) |  |  | (18,894,315 | ) |  |  | (10,827 | ) |  |  | (42,890,840 | ) |  |  | (24,908 | ) |  |  | (39,656,811 | ) |  |  | (33,411 | ) |  |  | (29,019,153 | ) |  |  | (29,738 | ) |  |  | (74,840,147 | ) |  |  | (132,975 | ) |  |  | (23,664,027 | ) |  |  | (49,392 | ) |  |  | (99,229,883 | ) |  |  | (89,247 | )
Balance at December 31, 2025 |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |

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- Definition Tabular disclosure of temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479857/480-10-S50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479887/480-10-S45-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479857/480-10-S50-1 + Details
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