Annual report pursuant to Section 13 and 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)
12 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of Options, Options outstanding, Beginning balance | shares 718,796
Number of Options, Granted | shares 565,550
Number of Options, Exercised | shares 0
Number of Options, Expired | shares (53,258)
Number of Options, Forfeited | shares (14,750)
Number of Options, Options outstanding, Ending balance | shares 1,216,338
Number of Options, Vested and exercisable, Ending Balance | shares 597,665
Weighted Average Exercise Price, Options outstanding, Beginning balance | $ / shares $ 31.70
Weighted Average Exercise Price, Granted | $ / shares 4.30
Weighted Average Exercise Price, Exercised | $ / shares 0
Weighted Average Exercise Price, Expired | $ / shares 18.19
Weighted Average Exercise Price, Forfeited | $ / shares 11.87
Weighted Average Exercise Price, Options outstanding, Ending balance | $ / shares 19.75
Weighted Average Exercise Price, Vested and exercisable, Ending balance | $ / shares $ 33.17
Weighted Average Remaining Contractual Life (in years), Options outstanding 7 years 1 month 17 days
Weighted Average Remaining Contractual Life (in years), Vested and exercisable 5 years 5 months 4 days
Aggregate Intrinsic value, Options outstanding | $ $ 1,098,143
Aggregate Intrinsic value, Vested and exercisable | $ $ 100,390