Income Taxes - Summary of Company's Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
Federal			$ (10)
State	$ (64)	$ 155	29
International	387	243	704
Total	323	398	723
Deferred:
Federal	(10,943)	(6,256)	(1,570)
State	(1,115)	(455)	(214)
International	(98)	251	(285)
Valuation allowance	12,350	7,287	1,754
Total	194	827	(315)
Income taxes	$ 517	$ 1,225	$ 408