Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 4,661	$ 3,530	$ 6,631
Other comprehensive income (loss):
Foreign currency translation adjustment	(617)	190	121
Total comprehensive income	$ 4,044	$ 3,720	$ 6,752