Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member] Series A [Member]	Common Stock [Member] Series B [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member] Series A [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Total
Beginning Balance at Dec. 31, 2020			$ 233	$ 494,389		$ (13,443)	$ (32,468)	$ (402,303)	$ 46,408
Beginning Balance, Shares at Dec. 31, 2020	5,213,710	617,245
Beginning Balance, Treasury Stock at Dec. 31, 2020					(478,465)
Net loss								(4,247)	(4,247)
Other comprehensive income							720		720
Conversion of Series B to Series A, shares	2,030	(2,030)
Dividends declared								(1,712)	(1,712)
Ending Balance at Jun. 30, 2021			58	494,563		(13,443)	(31,748)	(408,262)	41,168
Ending Balance, Shares at Jun. 30, 2021	5,215,740	615,215
Ending Balance, Shares Treasury Stock at Jun. 30, 2021					(478,465)
Beginning Balance at Mar. 31, 2021			233	494,389		(13,443)	(32,108)	(405,924)	43,147
Beginning Balance, Shares at Mar. 31, 2021	5,213,730	617,225
Beginning Balance, Treasury Stock at Mar. 31, 2021					(478,465)
Net loss								(1,482)	(1,482)
Other comprehensive income							360		360
Conversion of Series B to Series A, shares	2,010	(2,010)
Dividends declared								(856)	(856)
Reduction of shares at par value related to the reverse stock split			(175)	175
Fractional shares paid out related to the reverse stock				(1)					(1)
Ending Balance at Jun. 30, 2021			58	494,563		(13,443)	(31,748)	(408,262)	41,168
Ending Balance, Shares at Jun. 30, 2021	5,215,740	615,215
Ending Balance, Shares Treasury Stock at Jun. 30, 2021					(478,465)
Beginning Balance at Dec. 31, 2021			58	494,563		(13,443)	(32,406)	(406,195)	42,577
Beginning Balance, Shares at Dec. 31, 2021	5,216,045	614,910
Beginning Balance, Treasury Stock at Dec. 31, 2021					(478,465)
Net loss								(5,059)	(5,059)
Other comprehensive income							261		261
Conversion of Series B to Series A, shares	58	(58)
Dividends declared								(1,713)	(1,713)
Ending Balance at Jun. 30, 2022			58	494,563		(13,443)	(32,145)	(412,967)	36,066
Ending Balance, Shares at Jun. 30, 2022	5,216,103	614,852
Ending Balance, Shares Treasury Stock at Jun. 30, 2022					(478,465)
Beginning Balance at Mar. 31, 2022			58	494,563		(13,443)	(32,276)	(409,695)	39,207
Beginning Balance, Shares at Mar. 31, 2022	5,216,045	614,910
Beginning Balance, Treasury Stock at Mar. 31, 2022					(478,465)
Net loss								(2,415)	(2,415)
Other comprehensive income							131		131
Conversion of Series B to Series A, shares	58	(58)
Dividends declared								(857)	(857)
Ending Balance at Jun. 30, 2022			$ 58	$ 494,563		$ (13,443)	$ (32,145)	$ (412,967)	$ 36,066
Ending Balance, Shares at Jun. 30, 2022	5,216,103	614,852
Ending Balance, Shares Treasury Stock at Jun. 30, 2022					(478,465)