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Stock Compensation - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Detail)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]    
Expected volatility, Minimum 75.80% 76.30%
Expected volatility, Maximum   76.40%
Risk-free rate, Minimum 1.80% 0.60%
Risk-free rate, Maximum 1.90% 0.80%
Minimum [Member]    
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]    
Expected term (in years) 6 years 6 years
Maximum [Member]    
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]    
Expected term (in years) 6 years 1 month 6 days 6 years 1 month 6 days