Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $)	Sep. 30, 2013	Sep. 13, 2013	Dec. 31, 2012
Allowance for doubtful accounts (in Dollars)	$ 109,000		$ 162,000
Common stock, par value (in Dollars per share)	$ 1.00		$ 1.00
Common stock, authorized shares	4,000,000		4,000,000
Common stock, issued shares	1,879,319		1,879,319
Common stock, outstanding shares	1,687,319		1,687,319
Treasury stock at cost, shares	192,000		192,000
Redeemable Convertible Preferred Stock [Member] | Series C Preferred Stock [Member]
Series C redeemable, convertible preferred stock, par value (in Dollars per share)	$ 1.00		$ 0
Series C redeemable, convertible preferred stock, liquidation preference (in Dollars)	$ 5	$ 5.00	$ 0
Series C redeemable, authorized shares	100,000	100,000	0
Series C redeemable, convertible preferred stock, issued shares	60,000	60,000	0
Series C redeemable, convertible preferred stock, oustanding shares	60,000		0