CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,441	$ 844
Other comprehensive income (loss) before income taxes:
Foreign currency translation adjustments	(147)	(600)
Unrealized gains (losses) on available-for-sale securities:
Unrealized gains (losses) on available-for-sale securities	(72)	140
Total other comprehensive income (loss) before income taxes	(219)	(460)
Income tax provision	15	(30)
Total other comprehensive loss after income taxes	(204)	(490)
Total comprehensive income (loss)	$ 1,237	$ 354