CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 4,798	$ 1,799	$ 9,348	$ 4,276
Other comprehensive loss before income taxes:
Foreign currency translation adjustments	(159)	236	(285)	(210)
Unrealized gains (losses) on available-for-sale securities	(31)	(58)	(156)	203
Total other comprehensive income (loss) before income taxes	(190)	178	(441)	(7)
Income tax expense (benefit)	(6)	(12)	(32)	43
Total other comprehensive income (loss) after income taxes	(184)	190	(409)	(50)
Total comprehensive income	$ 4,614	$ 1,989	$ 8,939	$ 4,226