Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ 580	$ (11,767)	$ (8,290)	$ (45,862)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale securities	(69)	(38)	(16)	8
Foreign currency translation gain (loss)	9	(4)	(21)	8
Total other comprehensive income (loss), net of tax	(60)	(42)	(37)	16
Total comprehensive income (loss)	$ 520	$ (11,809)	$ (8,327)	$ (45,846)