Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (196)	$ (352)	$ (694)	$ (1,132)
Other comprehensive income (loss):
Unrealized gain (loss) on investments, net of tax				2
Other comprehensive income (loss)				2
Comprehensive loss	$ (196)	$ (352)	$ (694)	$ (1,130)