Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Stock Option and Incentive Plans - Summary of Stock Option Activity (Detail)
3 Months Ended
Mar. 31, 2020
USD ($)
$ / shares
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of Options, Options outstanding, Beginning balance | shares 1,216,338
Number of Options, Granted | shares 634,500
Number of Options, Exercised | shares 0
Number of Options, Expired | shares (8,000)
Number of Options, Forfeited | shares (24,250)
Number of Options, Options outstanding, Ending balance | shares 1,818,588
Number of Options, Vested and exercisable, Ending Balance | shares 663,055
Weighted Average Exercise Price, Options outstanding, Beginning balance | $ / shares $ 19.75
Weighted Average Exercise Price, Granted | $ / shares 10.78
Weighted Average Exercise Price, Exercised | $ / shares 0
Weighted Average Exercise Price, Expired | $ / shares 27.77
Weighted Average Exercise Price, Forfeited | $ / shares 11.76
Weighted Average Exercise Price, Options outstanding, Ending balance | $ / shares 16.69
Weighted Average Exercise Price, Vested and exercisable, Ending balance | $ / shares $ 30.71
Weighted Average Remaining Contractual Life (in years), Options outstanding 7 years 11 months 4 days
Weighted Average Remaining Contractual Life (in years), Vested and exercisable 5 years 7 months 27 days
Aggregate Intrinsic value, Options outstanding | $ $ 844,718
Aggregate Intrinsic value, Vested and exercisable | $ $ 90,400