Condensed Consolidated Statements of Changes in Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2019	$ 9,723	$ 12,121	$ 447,022	$ 797,817	$ (1,243,509)	$ (63,134)	$ (49,683)
Stock-based compensation			223				223
Treasury stock issued			(29,667)		29,667
Net (loss) income				5,118			5,118
Other comprehensive income						51	51
Balance at Mar. 31, 2020	9,723	12,121	417,578	802,935	(1,213,842)	(63,083)	(44,291)
Balance at Dec. 31, 2020	9,723	12,121	383,043	796,123	(1,178,799)	(65,611)	(53,123)
Stock-based compensation			210				210
Treasury stock issued			(16,010)		15,980		(30)
Net (loss) income				(1,758)			(1,758)
Other comprehensive income						278	278
Balance at Mar. 31, 2021	$ 9,723	$ 12,121	$ 367,243	$ 794,365	$ (1,162,819)	$ (65,333)	$ (54,423)