Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member] Series B Convertible Preferred Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Preferred Stock [Member] Series B Convertible Preferred Stock [Member] Conversion of Series B Convertible Preferred Stock into Common Stock [Member]	Preferred Stock [Member] Series B Convertible Preferred Stock [Member]	Preferred Stock Additional Paid-in Capital [Member] Series B Convertible Preferred Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Preferred Stock Additional Paid-in Capital [Member] Series B Convertible Preferred Stock [Member] Conversion of Series B Convertible Preferred Stock into Common Stock [Member]	Preferred Stock Additional Paid-in Capital [Member] Series B Convertible Preferred Stock [Member]	Common Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock [Member] Conversion of Series B Convertible Preferred Stock into Common Stock [Member]	Common Stock [Member]	Common Stock, Additional Paid-in Capital [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock, Additional Paid-in Capital [Member] Conversion of Series B Convertible Preferred Stock into Common Stock [Member]	Common Stock, Additional Paid-in Capital [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Retained Earnings [Member] Conversion of Series B Convertible Preferred Stock into Common Stock [Member]	Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Conversion of Series B Convertible Preferred Stock into Common Stock [Member]	Total
Balance (in shares) at Dec. 31, 2020			1,000						47,550,000
Balance at Dec. 31, 2020	$ 0		$ 0	$ 0		$ 621	$ 0		$ 8,559	$ 9,732		$ 129,887	$ 3,271		$ (111,899)	$ 13,003		$ 27,168
Issuance of common stock and warrants, shares (in shares)			0						41,211,000
Issuance of common stock and warrants			$ 0			0			$ 7,418			62,250			0			$ 69,668
Issuance of common stock upon warrant exercise (in shares)			0						32,063,000									32,063,000
Issuance of common stock upon warrant exercise			$ 0			0			$ 5,771			26,989			0			$ 32,760
Conversion of Series B convertible preferred stock to common stock		$ 0			$ (1)			$ 0			$ 1			$ 0			$ 0
Conversion of Series B convertible preferred stock to common stock (in shares)								0									1.000
Compensation cost for stock options granted			0			0			0			640			0			640
Net loss			$ 0			0			$ 0			0			(3,538)			(3,538)
Balance (in shares) at Mar. 31, 2021			1,000						120,824,000
Balance at Mar. 31, 2021			$ 0			620			$ 21,748			229,499			(112,166)			139,701
Balance (in shares) at Dec. 31, 2021			1,000						126,624,000
Balance at Dec. 31, 2021			$ 0			582			$ 22,792			243,996			(129,234)			138,136
Conversion of Series B convertible preferred stock to common stock (in shares)																	0
Compensation cost for stock options granted			0			0			0									1,806
Net loss			$ 0			0			$ 0			0						(4,786)
Balance (in shares) at Mar. 31, 2022			1,000						126,624,000
Balance at Mar. 31, 2022			$ 0			$ 582			$ 22,792			$ 245,802			$ (134,020)			$ 135,156