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Income Taxes - Summary of Statutory Tax Rates and Effective Tax Rates (Detail)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]    
Statutory tax rate 21.00% 21.00%
State taxes, net of federal benefits 6.65% 5.06%
Federal research and development credits 4.29% 3.28%
Change in valuation allowance (31.35%) (22.76%)
Stock-based compensation (0.73%) (5.85%)
Other 0.14% 0.55%
Effective tax rate (0.00%) 1.28%