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Net Loss per Common Share - Schedule of Anti-dilutive Shares Excluded from Computation of Diluted Net Loss Per Share (Detail) - shares
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock options, warrants and restricted stock 2,624,154 2,511,261
Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock options, warrants and restricted stock 2,624,154 2,509,511
Restricted Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock options, warrants and restricted stock 0 1,750