Quarterly report pursuant to Section 13 or 15(d)

Stock Option and Incentive Plans - Summary of Stock Option Activity (Detail)

v3.21.1
Stock Option and Incentive Plans - Summary of Stock Option Activity (Detail)
3 Months Ended
Mar. 31, 2021
USD ($)
$ / shares
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of Options, Options outstanding, Beginning balance | shares 1,853,841
Number of Options, Granted | shares 103,500
Number of Options, Exercised | shares 0
Number of Options, Expired | shares (32,144)
Number of Options, Forfeited | shares 0
Number of Options, Options outstanding, Ending balance | shares 1,925,197
Number of Options, Vested and exercisable, Ending Balance | shares 1,018,597
Weighted Average Exercise Price, Options outstanding, Beginning balance | $ / shares $ 14.33
Weighted Average Exercise Price, Granted | $ / shares 5.58
Weighted Average Exercise Price, Exercised | $ / shares 0
Weighted Average Exercise Price, Expired | $ / shares 86.61
Weighted Average Exercise Price, Forfeited | $ / shares 0
Weighted Average Exercise Price, Options outstanding, Ending balance | $ / shares 12.65
Weighted Average Exercise Price, Vested and exercisable, Ending balance | $ / shares $ 17.26
Weighted Average Remaining Contractual Life (in years), Options outstanding 7 years 5 months 23 days
Weighted Average Remaining Contractual Life (in years), Vested and exercisable 6 years 3 months 14 days
Aggregate Intrinsic value, Options outstanding | $ $ 315,944
Aggregate Intrinsic value, Vested and exercisable | $ $ 146,340