CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Series D and E Preferred Stock	Preferred Stock Series A-2 Preferred Stock	Preferred Stock Series C Preferred Stock	Preferred Stock Series D Preferred Stock	Preferred Stock Series E Preferred Stock	Common Stock	Common Stock Series A-2 Preferred Stock	Common Stock Series D and E Preferred Stock	Treasury Stock	Additional Paid-In Capital	Additional Paid-In Capital Series D and E Preferred Stock	Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2019			32	475	1,734,901	131,579	5,266,828			105,285
Beginning Balance at Dec. 31, 2019	$ 21,785		$ 0	$ 0	$ 0	$ 0	$ 1			$ (165)	$ 207,383		$ (185,434)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,129)												(3,129)
Stock-based compensation	32										32
Preferred stock conversion (in shares)				(150)			50,000
Issuance of preferred stock for accrued dividends (in shares)			13
Issuance of preferred stock for accrued dividends	98										98
Forfeited restricted stock (in shares)					(14,441)
Preferred stock dividends	(4)										(4)
Purchase of treasury stock	(7)									$ (7)
Ending Balance (in shares) at Mar. 31, 2020			45	325	1,720,460	131,579	5,316,828			105,285
Ending Balance at Mar. 31, 2020	18,775		$ 0	$ 0	$ 0	$ 0	$ 1			$ (172)	207,509		(188,563)
Beginning Balance (in shares) at Dec. 31, 2019			32	475	1,734,901	131,579	5,266,828			105,285
Beginning Balance at Dec. 31, 2019	21,785		$ 0	$ 0	$ 0	$ 0	$ 1			$ (165)	207,383		(185,434)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(6,514)
Preferred stock conversion (in shares)							50,000
Ending Balance (in shares) at Jun. 30, 2020			45	325	1,703,096	131,579	5,340,162			113,283
Ending Balance at Jun. 30, 2020	15,407		$ 0	$ 0	$ 0	$ 0	$ 1			$ (181)	207,535		(191,948)
Beginning Balance (in shares) at Dec. 31, 2019			32	475	1,734,901	131,579	5,266,828			105,285
Beginning Balance at Dec. 31, 2019	21,785		$ 0	$ 0	$ 0	$ 0	$ 1			$ (165)	207,383		(185,434)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation										$ (16)
Series D Preferred Stock exchanged for taxes (in shares)										(8,000)
Ending Balance (in shares) at Dec. 31, 2020			45		1,697,958	131,579	7,861,912			113,283
Ending Balance at Dec. 31, 2020	22,057		$ 0		$ 0	$ 0	$ 1			$ (181)	215,092		(192,855)
Beginning Balance (in shares) at Mar. 31, 2020			45	325	1,720,460	131,579	5,316,828			105,285
Beginning Balance at Mar. 31, 2020	18,775		$ 0	$ 0	$ 0	$ 0	$ 1			$ (172)	207,509		(188,563)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,385)												(3,385)
Stock-based compensation	29										29
Issuance of preferred stock for accrued dividends	1										1
Forfeited restricted stock (in shares)					(17,364)
Issuance of restricted stock (in shares)							23,334
Preferred stock dividends	(4)										(4)
Purchase of treasury stock (in shares)										7,998
Purchase of treasury stock	(9)									$ (9)
Ending Balance (in shares) at Jun. 30, 2020			45	325	1,703,096	131,579	5,340,162			113,283
Ending Balance at Jun. 30, 2020	15,407		$ 0	$ 0	$ 0	$ 0	$ 1			$ (181)	207,535		(191,948)
Beginning Balance (in shares) at Dec. 31, 2020			45		1,697,958	131,579	7,861,912			113,283
Beginning Balance at Dec. 31, 2020	22,057		$ 0		$ 0	$ 0	$ 1			$ (181)	215,092		(192,855)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,433)												(3,433)
Stock-based compensation	33										33
Preferred stock conversion (in shares)			(45)		(1,697,022)	(131,579)		84,292	18,762,119
Preferred stock conversion		$ 0							$ 2			$ (2)
Issuance of stock for services (in shares)							21,008
Issuance of stock for services	274										274
Forfeited restricted stock (in shares)					(81)
Series D Preferred Stock exchanged for taxes (in shares)					(855)
Ending Balance (in shares) at Mar. 31, 2021			0		0	0	26,729,331			113,283
Ending Balance at Mar. 31, 2021	18,931		$ 0		$ 0	$ 0	$ 3			$ (181)	215,397		(196,288)
Beginning Balance (in shares) at Dec. 31, 2020			45		1,697,958	131,579	7,861,912			113,283
Beginning Balance at Dec. 31, 2020	22,057		$ 0		$ 0	$ 0	$ 1			$ (181)	215,092		(192,855)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,679)
Preferred stock conversion (in shares)							18,846,411
Ending Balance (in shares) at Jun. 30, 2021			0		0	0	30,729,331			113,283
Ending Balance at Jun. 30, 2021	28,305		$ 0		$ 0	$ 0	$ 3			$ (181)	227,017		(198,534)
Beginning Balance (in shares) at Mar. 31, 2021			0		0	0	26,729,331			113,283
Beginning Balance at Mar. 31, 2021	18,931		$ 0		$ 0	$ 0	$ 3			$ (181)	215,397		(196,288)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,246)												(2,246)
Issuance of stock from financing, net of issuance costs (in shares)							4,000,000
Issuance of stock from financing, net of issuance costs	11,504										11,504
Issuance of stock for services	116										116
Ending Balance (in shares) at Jun. 30, 2021			0		0	0	30,729,331			113,283
Ending Balance at Jun. 30, 2021	$ 28,305		$ 0		$ 0	$ 0	$ 3			$ (181)	$ 227,017		$ (198,534)