Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,275	$ 10,662	$ 7,610
Other comprehensive income (loss), net of tax:
(Loss) reclassified into retained earnings from adoption of ASU 2018-02	(21)
Unrealized (loss) gain on foreign currency contracts, net of tax	(11)	94	(114)
Comprehensive income	$ 4,243	$ 10,756	$ 7,496