CONSOLIDATED STATEMENTS OF MEZZANINE EQUITY AND STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Series C Preferred Stock Preferred Stock	Series C Preferred Stock Rights Offering	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2019			$ 442	$ 75,690	$ (70,077)	$ 6,055
Balance (in shares) at Dec. 31, 2019			44,215
Net loss	$ 0		$ 0	0	(1,311)	(1,311)
Preferred stock dividend accumulation	460			(460)		(460)
Rights offering, proceeds net of expenses	$ 40,000		$ 300	2,776		3,076
Rights offering, proceeds net of expenses (in shares)	40		30,000
Balance at Dec. 31, 2020	$ 40,460		$ 742	78,006	(71,388)	7,360
Balance (in shares) at Dec. 31, 2020	40		74,215
Net loss	$ 0		$ 0	0	(469)	(469)
Preferred stock dividend accumulation	2,023			(2,023)		(2,023)
Rights offering, proceeds net of expenses (in shares)		40,000
Balance at Dec. 31, 2021	$ 42,483		$ 742	$ 75,983	$ (71,857)	$ 4,868
Balance (in shares) at Dec. 31, 2021	40		74,215