Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Stock Option and Incentive Plans - Summary of Stock Option Activity (Detail)
9 Months Ended
Sep. 30, 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 789,000
Number of Options, Exercised | shares (750)
Number of Options, Expired | shares (37,988)
Number of Options, Forfeited | shares (101,969)
Number of Options, Options outstanding, Ending balance | shares 1,864,631
Number of Options, Vested and exercisable, Ending Balance | shares 890,955
Weighted Average Exercise Price, Options outstanding, Beginning balance | $ / shares $ 19.75
Weighted Average Exercise Price, Granted | $ / shares 9.77
Weighted Average Exercise Price, Exercised | $ / shares 4.50
Weighted Average Exercise Price, Expired | $ / shares 41.78
Weighted Average Exercise Price, Forfeited | $ / shares 12.85
Weighted Average Exercise Price, Options outstanding, Ending balance | $ / shares 15.46
Weighted Average Exercise Price, Vested and exercisable, Ending balance | $ / shares $ 23.73
Weighted Average Remaining Contractual Life (in years), Options outstanding 7 years 6 months 25 days
Weighted Average Remaining Contractual Life (in years), Vested and exercisable 5 years 11 months 1 day
Aggregate Intrinsic value, Options outstanding | $ $ 568,320
Aggregate Intrinsic value, Vested and exercisable | $ $ 198,713