Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (376)	$ (2,268)	$ (1,817)	$ (3,911)
Other comprehensive income (loss) components:
Foreign currency translation	823	(1,541)	1,051	(2,205)
Total other comprehensive income (loss)	823	(1,541)	1,051	(2,205)
Comprehensive income (loss)	$ 447	$ (3,809)	$ (766)	$ (6,116)