Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ (8,302)	$ (15,565)	$ (8,869)	$ (34,095)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale securities	(148)	18	53	45
Foreign currency translation gain (loss)	18	2	(30)	13
Total other comprehensive income (loss), net of tax	(130)	20	23	58
Total comprehensive income (loss)	$ (8,432)	$ (15,545)	$ (8,846)	$ (34,037)