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) - USD ($)
6 Months Ended
Jun. 30, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of Options, Options outstanding, Beginning balance 1,216,338
Number of Options, Granted 769,000
Number of Options, Exercised (750)
Number of Options, Expired (30,917)
Number of Options, Forfeited (36,022)
Number of Options, Options outstanding, Ending balance 1,917,649
Number of Options, Vested and exercisable, Ending Balance 805,029
Weighted Average Exercise Price, Options outstanding, Beginning balance $ 19.75
Weighted Average Exercise Price, Granted 9.87
Weighted Average Exercise Price, Exercised 4.50
Weighted Average Exercise Price, Expired 34.13
Weighted Average Exercise Price, Forfeited 14.47
Weighted Average Exercise Price, Options outstanding, Ending balance 15.66
Weighted Average Exercise Price, Vested and exercisable, Ending balance $ 25.91
Weighted Average Remaining Contractual Life (in years), Options outstanding 7 years 11 months 8 days
Weighted Average Remaining Contractual Life (in years), Vested and exercisable 6 years 1 month 9 days
Aggregate Intrinsic value, Options outstanding $ 1,295,547
Aggregate Intrinsic value, Vested and exercisable $ 365,275