Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.20.2
Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended
Oct. 31, 2020
Aug. 19, 2021
Subsequent Event [Line Items]    
Warrants issued 161,084  
Warrants exercise price $ 1.00  
Gross proceeds from the exercise and exchange of warrants $ 161,084  
Stock options [Member]    
Subsequent Event [Line Items]    
Number of options exercised 35,000  
Stock option exercise price $ 0.61  
Gross proceeds from stock options exercised $ 21,350  
Stock Option Amendments [Member] | Executive Officers [Member]    
Subsequent Event [Line Items]    
Stock option exercise price   $ 0.61
Acceleration of vesting of stock options to purchase shares   279,675