Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ 26,038	$ (8,391)	$ (78,733)
Available-for-sale securities:
Change in net unrealized gains or losses	(311)	(53)	49
Unrealized gain (loss) on available-for-sale securities	(311)	(53)	49
Currency translation adjustments:
Change in currency translation adjustments	(52)	5	(19)
Reclassification adjustments for net (gains) losses included in net income			44
Net changes related to currency translation adjustments	(52)	5	25
Total other comprehensive income (loss), net of tax	(363)	(48)	74
Total comprehensive income (loss)	$ 25,675	$ (8,439)	$ (78,659)