XML 67 R55.htm IDEA: XBRL DOCUMENT v3.21.1
Stockholders' Equity - Summary of Warrant 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
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
Exercised, Weighted-Average Exercise Price Per Share 2.68
Outstanding Ending Balance, Weighted-Average Exercise Price Per Share $ 2.84
Warrants [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Outstanding Beginning Balance, Number of Shares | shares 1,021,060
Exercised, Number of Shares | shares (181,834)
Canceled/Forfeited, Number of Shares | shares (339,226)
Outstanding Ending Balance, Number of Shares | shares 500,000
Outstanding Beginning Balance, Weighted-Average Exercise Price Per Share $ 1.56
Exercised, Weighted-Average Exercise Price Per Share 1.23
Canceled/Forfeited, Weighted-Average Exercise Price Per Share 1.83
Outstanding Ending Balance, Weighted-Average Exercise Price Per Share 1.50
Warrants [Member] | Outstanding $1.15 - $3.38 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Minimum 1.15
Exercise Price Per Share, Maximum 3.88
Warrants [Member] | Exercised, $1.15 - $3.88 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Minimum 1.15
Exercise Price Per Share, Maximum 3.88
Warrants [Member] | Canceled/Forfeited, $1.15 - $3.88 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Minimum 1.15
Exercise Price Per Share, Maximum 3.88
Warrants [Member] | Outstanding, $1.50 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Exercise Price Per Share, Maximum $ 1.50