Consolidated Statements of Shareholders' Deficit - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2016	$ 928	$ 744,873	$ (804,319)	$ 9,319	$ (49,199)
Issuances and cancellations of nonvested shares	43	(43)
Compensation recognized under stock compensation plans		107			107
Net income (loss)			(10,865)		(10,865)
Other comprehensive loss				2,075	2,075
Balance at Dec. 31, 2017	971	744,937	(815,184)	11,394	(57,882)
Issuances and cancellations of nonvested shares	20	(20)
Compensation recognized under stock compensation plans		187			187
Net income (loss)			6,134		6,134
Other comprehensive loss				(11,395)	(11,395)
Balance at Dec. 31, 2018	$ 991	$ 745,104	$ (809,050)	$ (1)	$ (62,956)