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Stockholders' Equity - Summary of Stock Option Activity (Detail)
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Outstanding Beginning Balance, Number of Shares | shares 3,177,942
Granted, Number of Shares | shares 193,000
Exercised, Number of Shares | shares (94,554)
Canceled/Forfeited, Number of Shares | shares (6,250)
Outstanding Ending Balance, Number of Shares | shares 3,270,138
Outstanding Beginning Balance, Weighted-Average Exercise Price Per Share $ 2.78
Granted, Weighted-Average Exercise Price Per Share 3.82
Exercised, Weighted-Average Exercise Price Per Share 2.68
Cancelled/Forfeited, Weighted-Average Exercise Price Per Share 5.44
Outstanding Ending Balance, Weighted-Average Exercise Price Per Share 2.84
Outstanding, $1.17 - $23.30 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Minimum 1.17
Exercise Price Per Share, Maximum 23.20
Granted, $3.83 - $3.01 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Minimum 3.83
Exercise Price Per Share, Maximum 3.01
Exercised, $3.10 - $1.48 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Minimum 3.10
Exercise Price Per Share, Maximum 1.48
Cancelled/Forfeited $5.44 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Maximum 5.44
Outstanding, $1.17 - $23.20 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Minimum 1.17
Exercise Price Per Share, Maximum $ 23.20