CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)	Sep. 30, 2015	Jun. 30, 2015
Allowance for doubtful accounts on trade receivables (in dollars)	$ 16,596	$ 16,296
Common stock, par value (in dollars per share)	$ 1	$ 1
Prior Cumulative Preferred Stock, $5 Par Value | Series A
Preferred stock, par value (in dollars per share)	$ 5	$ 5
Preferred stock, liquidation preference (in dollars)	$ 2,227,500	$ 2,220,000
Prior Cumulative Preferred Stock, $5 Par Value | Series B
Preferred stock, par value (in dollars per share)	$ 5	$ 5
Preferred stock, liquidation preference (in dollars)	$ 2,182,500	$ 2,175,000
Cumulative Preferred Stock, $20 Par Value | Series A
Preferred stock, par value (in dollars per share)	$ 20	$ 20
Preferred stock, liquidation preference (in dollars)	$ 5,033,830	$ 5,019,197
Cumulative Preferred Stock, $20 Par Value | Series B
Preferred stock, par value (in dollars per share)	$ 20	$ 20
Preferred stock, liquidation preference (in dollars)	$ 820,362	$ 817,977