Stock-Based Compensation Expense - Common stock reserved for future issuance (Details) - shares	Mar. 31, 2026	Dec. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares of common stock reserved	9,885,570	8,378,005
Restricted Stock Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares of common stock reserved	2,231,276	813,199
Stock options issued and outstanding under the 2006, 2015 and 2021 plans
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares of common stock reserved	6,700,057	6,556,728
Shares Available For Future Issuance Under The 2006 ,2015 And 2021 Plans [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares of common stock reserved	559,369	613,210
The 2021 ESPP Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares of common stock reserved	394,868	394,868