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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - 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 (loss)	$ 11,166	$ (9,140)	$ 8,553	$ (15,679)
Other comprehensive income (loss):
Foreign currency translation adjustment	4	2	(17)	2
Unrealized gain (loss) on marketable securities, net of tax	(54)	134	(85)	38
Total comprehensive income (loss)	$ 11,116	$ (9,004)	$ 8,451	$ (15,639)

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