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	(5,208)	0	(5,208)
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	(3,473)	0	(3,473)
Balance at Dec. 31, 2022	$ 464	$ 548,304	$ (544,674)	$ (5,168)	$ (1,074)