Unaudited Condensed Consolidated Statements of Changes In Stockholders' Equity (Deficit) - USD ($)	Total	Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Balance, beginning of year and end of six month period (in shares)		(949,000)	(12,808,000)
Balance (in shares) at Dec. 31, 2017		949,000	12,808,000
Balance at Dec. 31, 2017		$ 1,843,000	$ 128,000		$ 56,518,000	$ (61,529,000)	$ (107,000)
Exercise of stock options (in shares)	219,000		219,000
Exercise of stock options			$ 2,000		69,000
Balance, beginning of year and end of six month period (in shares)		(949,000)	(12,808,000)
Stock-based compensation					11,000
Preferred stock dividends declared, net of waived penalties by shareholders					(47,000)
Net income	$ 820,000					820,000
Balance at Jun. 30, 2018	(2,654,000)		$ 130,000		56,551,000	(60,709,000)
Balance, beginning of year and end of six month period (in shares)			(13,027,000)	(362,000)
Balance, beginning of year and end of six month period (in shares)		(949,000)	(13,259,000)
Balance (in shares) at Dec. 31, 2018		949,000	13,259,000
Balance at Dec. 31, 2018	$ (1,062,000)	$ 1,843,000	$ 133,000		56,609,000	(59,242,000)	$ (43,000)
Exercise of stock options (in shares)	280,500		280,000
Exercise of stock options			$ 2,000		224,000
Balance, beginning of year and end of six month period (in shares)		(949,000)	(13,259,000)
Stock-based compensation					14,000
Preferred stock dividends declared, net of waived penalties by shareholders					(62,000)
Net income	$ 2,706,000					2,706,000
Balance at Jun. 30, 2019	$ 1,822,000		$ 135,000		$ 56,785,000	$ (56,536,000)
Balance, beginning of year and end of six month period (in shares)			(13,539,000)	(362,000)