Quarterly report pursuant to Section 13 or 15(d)

Summary of Unvested Restricted Stock Units (Detail)

v3.21.1
Summary of Unvested Restricted Stock Units (Detail) - Restricted Stock Units (RSUs)
shares in Thousands
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Beginning Balance | shares 3,672
Granted | shares 1,164
Vested | shares (1,694)
Forfeited or cancelled | shares (465)
Ending Balance | shares 2,677
Unvested RSUs at December 31, 2020 | $ / shares $ 0.66
Granted | $ / shares 1.14
Vested | $ / shares 0.88
Forfeited or cancelled | $ / shares 1.50
Unvested RSUs at March 31, 2021 | $ / shares $ 0.58