CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Jun. 30, 2016	Jun. 30, 2015
Accounts receivable, allowance for doubtful accounts	$ 207,028	$ 477,240
Other receivables, allowance for doubtful accounts	$ 145,186	$ 241,604
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred Stock, Shares Issued	0	0
Common stock, shares authorized	50,000,000	50,000,000
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares issued	8,456,032	7,996,032
Common stock, shares outstanding	8,280,535	7,870,841
Treasury stock, shares	175,497	125,191