Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 10,662	$ 7,610	$ (5,347)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on foreign currency contracts, net of tax	94	(114)	21
Comprehensive income (loss)	$ 10,756	$ 7,496	$ (5,326)