Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2016	Jun. 30, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts (in dollars)	$ 96,868	$ 126,868
Accumulated amortization and depreciation (in dollars)	6,976,282	5,672,287
Patents, Accumulated amortization (in dollars)	$ 885,394	$ 791,551
Common stock, par value (in dollars per share)	$ .01	$ .01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	7,948,234	7,869,095
Common stock, shares outstanding	7,809,385	7,744,113
Treasury stock, shares	138,849	124,982