Condensed Consolidated Balance Sheet and Statement of Operations and Comprehensive Loss Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Trade accruals	$ 5,635	$ 7,131
Accrued payroll and employee medical	14,270	17,882
Accrued bonus	20,905	25,736
Current portion of early exercise stock option liability	327	4,957
Contract liability	2,791	7,470
Current portion of operating lease liabilities	6,450	6,080
Other accrued expenses	6,489	8,286
Total accrued expenses and other current liabilities	$ 56,867	$ 77,542