Consolidated Statements of Changes in Stockholders' Deficit - USD ($) shares in Thousands	Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance, beginning of year and end of year (in shares)	949	12,758
Balance, beginning of year and end of year (in shares) at Dec. 31, 2016	949	12,758
Balance, beginning of year and end of year at Dec. 31, 2016	$ 1,843,000	$ 128,000		$ 56,595,000	$ (61,499,000)	$ (107,000)
Stock-based compensation				18,000
Exercise of stock options (in shares)		50					50
Exercise of stock options				$ 11,000
Balance, end of year (in shares) at Dec. 31, 2017	949	12,808	(362)	56,518
Preferred stock dividends declared, net of waived penalties by shareholders				$ (106,000)
Balance, end of year at Dec. 31, 2017	$ 1,843,000	$ 128,000		$ 56,518,000	(61,529,000)	(107,000)	$ (3,509,000)
Balance, beginning of year and end of year (in shares)	949	12,808	(362)	56,518
Net income (loss)					(30,000)		(30,000)
Extinguishment of U.K. cumulative translation adjustment
Balance, beginning of year and end of year (in shares)	949	12,808	(362)	56,518
Stock-based compensation				$ 20,000
Exercise of stock options (in shares)		451					451
Exercise of stock options		$ 5,000		$ 163,000
Balance, end of year (in shares) at Dec. 31, 2018		13,259	(362)	56,609
Preferred stock dividends declared, net of waived penalties by shareholders				$ (92,000)
Balance, end of year at Dec. 31, 2018		$ 133,000			(59,242,000)	(43,000)	$ (1,062,000)
Balance, beginning of year and end of year (in shares)	949	12,808	(362)	56,609
Net income (loss)					$ 2,287,000		2,287,000
Extinguishment of U.K. cumulative translation adjustment						$ 64,000	$ 64,000
Balance, beginning of year and end of year (in shares)		13,259	(362)	56,609