CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 3,109	$ 1,633	$ 4,550	$ 2,477
Other comprehensive loss before income taxes:
Foreign currency translation adjustments	20	154	(127)	(446)
Unrealized gains (losses) on available-for-sale securities:
Unrealized gains (losses) on available-for-sale securities	(52)	121	(124)	261
Total other comprehensive income (loss) before income taxes	(32)	275	(251)	(185)
Income tax provision	11	(25)	26	(55)
Total other comprehensive income (loss) after income taxes	(21)	250	(225)	(240)
Total comprehensive income	$ 3,088	$ 1,883	$ 4,325	$ 2,237