Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,711	$ (836)	$ (498)	$ (780)
Other comprehensive income (loss):
Unrealized gain (loss) on investments, net of tax	(11)	21		3
Other comprehensive income (loss)	(11)	21		3
Comprehensive income (loss)	$ 1,700	$ (815)	$ (498)	$ (777)