v3.20.2
Stock-Based Compensation - Summary of RSU Activity (Detail) - Restricted Stock Units
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unvested and Outstanding Beginning Balance | shares 179,494,619
RSUs granted | shares 96,707,758
RSUs vested | shares (68,149,214)
RSUs canceled | shares (8,397,930)
Unvested and Outstanding Ending Balance | shares 199,655,233
Weighted Average Grant Date Fair Value per Share Beginning Balance | $ / shares $ 6.03
RSUs granted | $ / shares 7.49
RSUs vested | $ / shares 6.18
RSUs canceled | $ / shares 6.02
Weighted Average Grant Date Fair Value per Share Ending Balance | $ / shares $ 6.69