Income Taxes - Summary of Gross and Tax Effected Deferred Tax Asset Recorded (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Deferred Tax Asset [Line Items]
Stock-based compensation	$ 11,793
Deferred rent liability	5,318
Accrued expenses	6,040
Incentive compensation	(4,442)
Fixed assets	(5,865)
Other	(539)
Total U.S. deferred components	$ 16,500
U.S. income tax rate	38.40%
Total tax effected	$ 6,662
U.S [Member]
Deferred Tax Asset [Line Items]
NOL - U.S	4,195
Total tax effected	6,336
Japan [Member]
Deferred Tax Asset [Line Items]
Total tax effected	$ 326