CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income (loss)	$ 1,325	$ 1,159	$ (1,098)	$ 4,388
Other comprehensive loss:
Foreign currency translation adjustments	(369)	81	(1,029)	(353)
Unrealized gain (loss) on short-term investments, net of tax	9	(175)	67	151
Other comprehensive loss	(360)	(94)	(962)	(202)
Total comprehensive income (loss)	$ 965	$ 1,065	$ (2,060)	$ 4,186