CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Thousands	Series E Convertible Preferred stock	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2020		$ 94	$ 69,991	$ (68,960)	$ 1,125
Balance (in shares) at Dec. 31, 2020		9,388,407
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of common stock and warrants to purchase common stock		$ 3	595		598
Issuance of common stock and warrants to purchase common stock (in shares)		300,000
Share-based compensation			261		261
Net loss				(1,256)	(1,256)
Balance at Jun. 30, 2021		$ 97	70,847	(70,216)	728
Balance (in shares) at Jun. 30, 2021		9,688,407
Balance at Mar. 31, 2021		$ 94	70,121	(69,834)	381
Balance (in shares) at Mar. 31, 2021		9,388,407
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of common stock and warrants to purchase common stock		$ 3	595		598
Issuance of common stock and warrants to purchase common stock (in shares)		300,000
Share-based compensation	$ 0	$ 0	131	0	131
Share-based compensation (in shares)		0
Net loss	0	$ 0	0	(382)	(382)
Balance at Jun. 30, 2021		$ 97	70,847	(70,216)	728
Balance (in shares) at Jun. 30, 2021		9,688,407
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of series E convertible preferred stock	4,000
Preferred stock dividends	18
Balance at Jun. 30, 2022	4,018				4,018
Balance at Dec. 31, 2021		$ 108	73,801	(76,938)	(3,029)
Balance (in shares) at Dec. 31, 2021		10,760,871
Increase (Decrease) in Temporary Equity [Roll Forward]
Preferred stock dividends			(18)		(18)
Issuance of common stock and warrants to purchase common stock		$ 8	5,052		5,060
Issuance of common stock and warrants to purchase common stock (in shares)		854,771
Share-based compensation			512		512
Net loss				(3,522)	(3,522)
Balance at Jun. 30, 2022		$ 116	79,347	(80,460)	(997)
Balance (in shares) at Jun. 30, 2022		11,615,642
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of series E convertible preferred stock	4,000
Preferred stock dividends	18
Balance at Jun. 30, 2022	4,018				4,018
Balance at Mar. 31, 2022		$ 108	74,036	(79,115)	(4,971)
Balance (in shares) at Mar. 31, 2022		10,760,871
Increase (Decrease) in Temporary Equity [Roll Forward]
Preferred stock dividends			(18)		(18)
Issuance of common stock and warrants to purchase common stock		$ 8	5,052		5,060
Issuance of common stock and warrants to purchase common stock (in shares)		854,771
Share-based compensation	0	$ 0	277	0	277
Share-based compensation (in shares)		0
Net loss	$ 0	$ 0	0	(1,345)	(1,345)
Balance at Jun. 30, 2022		$ 116	$ 79,347	$ (80,460)	$ (997)
Balance (in shares) at Jun. 30, 2022		11,615,642