Quarterly report pursuant to Section 13 or 15(d)

Stock Warrants - Summary of Black- Scholes model using the following inputs (Detail)

v3.21.2
Stock Warrants - Summary of Black- Scholes model using the following inputs (Detail) - $ / shares
9 Months Ended
Jul. 14, 2021
Jun. 10, 2021
Sep. 30, 2021
Sep. 30, 2020
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]        
Expected option term (in years) 5 years   4 years 9 months 14 days  
Expected volatility 70.00%   70.00%  
Risk-free interest rate 0.85%   0.93%  
Expected dividend yield 0.00%   0.00%  
Fair value of common stock (per share) $ 8.97   $ 6.56  
Expected (remaining) option term (in years) | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]        
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]        
Expected option term (in years)   3 years 8 months 8 days   4 years 4 months 20 days
Expected volatility | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]        
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]        
Expected volatility   65.00%   55.00%
Risk-free interest rate | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]        
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]        
Risk-free interest rate   0.45%   0.28%
Expected dividend yield | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]        
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]        
Expected dividend yield   0.00%   0.00%
Fair value of common stock (per share) | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]        
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]        
Fair value of common stock (per share)   $ 9.51 $ 2.07