CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)	Mar. 31, 2016	Jun. 30, 2015
Allowance for doubtful accounts on trade receivables (in dollars)	$ 17,196	$ 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)	$ 2,242,500	$ 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)	$ 2,197,500	$ 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)	$ 5,063,097	$ 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)	$ 825,131	$ 817,977