Quarterly report pursuant to Section 13 or 15(d)

Summary of Unvested Restricted Stock Units (Detail)

v3.20.1
Summary of Unvested Restricted Stock Units (Detail) - Restricted Stock Units (RSUs)
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Shares  
Beginning Balance | shares 3,564,000
Granted | shares 20,000
Vested | shares (416,000)
Forfeited or cancelled | shares (840,000)
Ending Balance | shares 2,328,000
Weighted Average Grant Date Fair Value  
Unvested RSUs at December 31, 2019 | $ / shares $ 1.68
Granted | $ / shares 0.38
Vested | $ / shares 0.67
Forfeited or cancelled | $ / shares 1.96
Unvested RSUs at March 31, 2020 | $ / shares $ 1.63