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Income Taxes - Reconciliation of Income Tax Computed at Federal Statutory Rates to Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]    
Tax provision at U.S. statutory rate $ (27,368) $ (13,316)
Stock-based compensation 794 426
R&D tax credits (2,392) (1,031)
Change in valuation allowance 25,911 13,906
Section 382 limitations 2,922  
Other $ 133 $ 15