Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Schedule of Restricted Stock Units Activity (Detail)

v3.19.3
Stock Based Compensation - Schedule of Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs) [Member]
9 Months Ended
Sep. 30, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Options, Outstanding | shares 2,469,174
RSUs granted | shares 640,426
RSUs forfeited | shares (598,316)
RSUs vested | shares (903,796)
Number of Options, Outstanding | shares 1,607,488
Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares $ 15.07
Weighted Average Grant Date Fair Value, RSUs granted | $ / shares 5.57
Weighted Average Grant Date Fair Value, RSUs forfeited | $ / shares 14.38
Weighted Average Grant Date Fair Value, RSUs vested | $ / shares 14.01
Weighted Average Grant Date Fair Value, Ending Balance | $ / shares $ 12.14