CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 3,387	$ 20,394	$ 4,044	$ 12,488
Other comprehensive income (loss), net of applicable taxes:
Foreign currency translation adjustment	1,457	422	286	260
Unrealized (loss) gain on short-term investments	(446)	232	178	647
Total other comprehensive income	1,011	654	464	907
Comprehensive income	$ 4,398	$ 21,048	$ 4,508	$ 13,395