Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Stock Option Activity Under Equity Incentive Plan (Parenthetical) (Detail)

v3.8.0.1
Stock Based Compensation - Stock Option Activity Under Equity Incentive Plan (Parenthetical) (Detail) - shares
9 Months Ended
Aug. 01, 2017
Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Stock options assumed in merger 963,681 963,681