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, 2020	$ 464	$ 548,304	$ (535,993)	$ (5,168)	$ 7,607
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	(1,635)	0	(1,635)
Balance at Mar. 31, 2021	464	548,304	(537,628)	(5,168)	5,972
Balance at Dec. 31, 2020	464	548,304	(535,993)	(5,168)	7,607
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)					(4,133)
Balance at Sep. 30, 2021	464	548,304	(540,126)	(5,168)	3,474
Balance at Mar. 31, 2021	464	548,304	(537,628)	(5,168)	5,972
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	(1,234)	0	(1,234)
Balance at Jun. 30, 2021	464	548,304	(538,862)	(5,168)	4,738
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	(1,264)	0	(1,264)
Balance at Sep. 30, 2021	464	548,304	(540,126)	(5,168)	3,474
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, 2021	464	548,304	(541,201)	(5,168)	2,399
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)					(2,757)
Balance at Sep. 30, 2022	464	548,304	(543,958)	(5,168)	(358)
Balance at Mar. 31, 2022	464	548,304	(542,258)	(5,168)	1,342
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	(983)	0	(983)
Balance at Jun. 30, 2022	464	548,304	(543,241)	(5,168)	359
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	(717)	0	(717)
Balance at Sep. 30, 2022	$ 464	$ 548,304	$ (543,958)	$ (5,168)	$ (358)