CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts (in Dollars)	$ 170,000	$ 160,000
Preferred stock par value (in Dollars per share)	$ 1.66	$ 1.66
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock par value (in Dollars per share)	$ 1.66	$ 1.66
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	5,126,964	5,116,826
Common stock, shares outstanding	5,126,964	5,116,826