Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Summary of RSU Activity (Detail)

v3.20.2
Stockholders' Equity - Summary of RSU Activity (Detail) - Unvested RSUs
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Shares, Unvested as of December 31, 2019 | shares 1,910,764
Shares, Granted | shares 3,880,991
Shares, Forfeited | shares (650,540)
Shares, Vested | shares (1,096,522)
Shares, Outstanding as of September 30, 2020 | shares 4,044,693
Weighted Average Grant Date Fair Value, Unvested as of December 31, 2019 | $ / shares $ 26.93
Weighted Average Grant Date Fair Value, Granted | $ / shares 12.09
Weighted Average Grant Date Fair Value, Forfeited | $ / shares 19.18
Weighted Average Grant Date Fair Value, Vested | $ / shares 20.14
Weighted Average Grant Date Fair Value, Outstanding as of September 30, 2020 | $ / shares $ 15.78