Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share - Additional Information (Detail)

v3.21.2
Net Loss Per Common Share - Additional Information (Detail) - shares
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Stock Options, Warrants and Convertible Preferred Stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common shares excluded from the computation of diluted net loss per share on effect of anti-dilutive 11,696,000 9,996,000