Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income (loss)	$ 1,058	$ 160	$ 1,951	$ (348)
Other comprehensive income (loss):
Foreign currency translation adjustments	14	(6)	15	(14)
Unrealized gain on available-for-sale marketable securities	5	5	(12)	21
Total comprehensive income (loss)	$ 1,077	$ 159	$ 1,954	$ (341)