Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2021	$ 14,187	$ 1,334	$ 558,945	$ (546,092)
Balance (in shares) at Dec. 31, 2021		13,410,000
Number of options exercised	0
Stock-based compensation	$ 20		20
Net loss	(132)			(132)
Balance at Mar. 31, 2022	14,075	$ 1,334	558,965	(546,224)
Balance (in shares) at Mar. 31, 2022		13,410,000
Balance at Dec. 31, 2022	19,247	$ 1,342	565,541	(547,636)
Balance (in shares) at Dec. 31, 2022		14,215,000
Exercise of stock options	179	$ 1	178
Number of options exercised		40,000
Stock-based compensation	17		17
Net loss	(271)			(271)
Balance at Mar. 31, 2023	$ 19,172	$ 1,343	$ 565,736	$ (547,907)
Balance (in shares) at Mar. 31, 2023		14,255,000