Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 4,593	$ 3,184	$ 905
Foreign currency translation adjustments	1,128	(180)	(507)
Comprehensive income	$ 5,721	$ 3,004	$ 398