Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Accounts receivable-trade, net allowance for doubtful accounts	$ 2,060	$ 395
OTHER INTANGIBLES, accumulated amortization	$ 685,947	$ 665,225
Preferred stock par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0024	$ 0.0024
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	11,275,641	11,239,157
Common stock, shares outstanding (in shares)	10,282,018	10,245,534
Treasury stock shares (in shares)	993,623	993,623