Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Loss from continuing operations	$ (459)	$ (723)
Loss from discontinued operations	(271)	(340)
Net loss	(730)	(1,063)
Other comprehensive income:
Unrealized gain (loss) on investments, net of taxes	(1)	1
Other comprehensive income (loss)	(1)	1
Comprehensive loss	$ (731)	$ (1,062)