Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts (in Dollars)	$ 194,000	$ 199,000
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
Series C Preferred Stock [Member]
Series C redeemable, convertible preferred stock, Par value (in Dollars per share)	$ 1.00	$ 1.00
Series C redeemable, convertible preferred stock, Liquidation preference (in Dollars per share)	$ 5.00	$ 5.00
Series C redeemable, convertible preferred stock, Authorized shares	100,000	100,000
Series C redeemable, convertible preferred stock, Issued shares	60,000	60,000
Series C redeemable, convertible preferred stock, Outstanding shares	60,000	60,000