Condensed Consolidated Statements of Changes in Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2021	$ 464	$ 548,304	$ (541,201)	$ (5,168)	$ 2,399
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	(1,057)	0	(1,057)
Balance at Mar. 31, 2022	464	548,304	(542,258)	(5,168)	1,342
Balance at Dec. 31, 2022	464	548,304	(544,674)	(5,168)	(1,074)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	(1,220)	0	(1,220)
Balance at Mar. 31, 2023	$ 464	$ 548,304	$ (545,894)	$ (5,168)	$ (2,294)