Quarterly report pursuant to Section 13 or 15(d)

Summary of Unvested Restricted Stock Units (Detail)

v3.21.2
Summary of Unvested Restricted Stock Units (Detail) - Restricted Stock Units (RSUs)
shares in Thousands
6 Months Ended
Jun. 30, 2021
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Beginning Balance | shares 3,672
Granted | shares 1,378
Vested | shares (2,879)
Forfeited or cancelled | shares (521)
Ending Balance | shares 1,650
Unvested RSUs at December 31, 2020 | $ / shares $ 0.66
Granted | $ / shares 1.08
Vested | $ / shares 0.69
Forfeited or cancelled | $ / shares 1.38
Unvested RSUs at June 30, 2021 | $ / shares $ 0.72