Quarterly report pursuant to Section 13 or 15(d)

Stock Plans - Schedule of Performance-Based Stock Options Activity (Detail)

v3.20.2
Stock Plans - Schedule of Performance-Based Stock Options Activity (Detail) - Performance-based Stock Options [Member]
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options, Outstanding, Beginning Balance | shares 4,484,739
Options Forfeited | shares (298,956)
Options, Outstanding, Ending Balance | shares 4,185,783
Weighted-Average Exercise Price, Outstanding, Beginning Balance | $ / shares $ 16.68
Weighted-Average Exercise Price, Options Forfeited | $ / shares 5.65
Weighted-Average Exercise Price, Outstanding, Ending Balance | $ / shares $ 10.45
Weighted-Average Remaining Contractual Term, Outstanding 7 years 9 months 18 days
Weighted-Average Aggregate Intrinsic Value | $ $ 3,507