Income Taxes - Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
NOLs	$ 1,828	$ 2,013
Foreign NOLs	2,051	816
Stock-based compensation	4,868	6,046
Accrued expenses	10,197	5,236
Deferred rent liability	2,116	2,170
Other	82	82
Deferred tax assets	21,142	16,363
Deferred tax liabilities:
Incentive compensation	2,753	4,092
Fixed assets	2,272	1,965
Unrealized gains	(5)
Deferred tax liabilities	5,020	6,057
Total deferred tax assets less deferred tax liabilities	16,122	10,306
Less: valuation allowance	(2,051)	(816)
Net deferred tax assets and liabilities	$ 14,071	$ 9,490