Condensed Consolidated Statements of Changes in Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Preferred Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	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, 2018				$ 11,377		$ (11,355)	$ 22	$ 9,723	$ 12,115	$ 453,868	$ 812,704	$ (1,251,388)	$ (46,483)	$ (19,184)
Stock-based compensation										151				151
Treasury stock issued										(1,968)		1,984		16
Net income (loss)											(13,527)			(13,527)
Other comprehensive income													522	522
Other comprehensive loss													522	522
Balance at Mar. 31, 2019								9,723	12,115	452,051	810,554	(1,249,404)	(57,316)	(32,000)
Balance at Dec. 31, 2018				$ 11,377		$ (11,355)	$ 22	9,723	12,115	453,868	812,704	(1,251,388)	(46,483)	(19,184)
Net income (loss)														(23,318)
Other comprehensive income													(10,018)	(10,018)
Balance at Sep. 30, 2019								9,723	12,121	447,244	800,763	(1,244,056)	(56,501)	(40,429)
Balance at Mar. 31, 2019								9,723	12,115	452,051	810,554	(1,249,404)	(57,316)	(32,000)
Stock-based compensation										239				239
Treasury stock issued										(345)		343		(2)
Net income (loss)											(3,803)			(3,803)
Other comprehensive income													926	926
Stock Option activities									6	(8)				(2)
Other comprehensive loss													926	926
Balance at Jun. 30, 2019								9,723	12,121	451,937	806,751	(1,249,061)	(56,390)	(34,642)
Stock-based compensation										312				312
Treasury stock issued										(5,005)		5,005
Net income (loss)											(5,988)			(5,988)
Other comprehensive income													(111)	(111)
Other comprehensive loss													(111)	(111)
Other comprehensive income														(111)
Balance at Sep. 30, 2019								9,723	12,121	447,244	800,763	(1,244,056)	(56,501)	(40,429)
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 income (loss)											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, 2019								9,723	12,121	447,022	797,817	(1,243,509)	(63,134)	(49,683)
Net income (loss)														(2,738)
Other comprehensive income													2,894	2,894
Balance at Sep. 30, 2020								9,723	12,121	393,545	795,079	(1,189,465)	(60,240)	(48,960)
Balance at Mar. 31, 2020								9,723	12,121	417,578	802,935	(1,213,842)	(63,083)	(44,291)
Stock-based compensation										81				81
Treasury stock issued										(7,416)		7,416
Net income (loss)											(6,235)			(6,235)
Other comprehensive income													1,105	1,105
Balance at Jun. 30, 2020								9,723	12,121	410,243	796,700	(1,206,426)	(61,978)	(49,340)
Stock-based compensation										277				277
Treasury stock issued										(16,975)		16,961		(14)
Net income (loss)											(1,621)			(1,621)
Other comprehensive income													1,738	1,738
Balance at Sep. 30, 2020								$ 9,723	$ 12,121	$ 393,545	$ 795,079	$ (1,189,465)	$ (60,240)	$ (48,960)