CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts (in Dollars)	$ 113,000	$ 113,000
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	5,181,249	5,175,258
Common stock, shares outstanding	5,181,249	5,175,258