Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2017	Jun. 30, 2017
Allowance for doubtful trade accounts receivable	$ 13,548	$ 7,356
Class A Common Shares [Member]
Common stock: Class A, par value	$ 0.01	$ 0.01
Common stock: Class A, shares authorized	34,500,000	34,500,000
Common stock: Class A, shares issued	24,247,826	24,215,733
Common stock: Class A, shares outstanding	24,247,826	24,215,733
Series D Preferred Stock [Member]
Preferred stock: Series D, par value	$ 0.01	$ 0.01
Preferred stock: Series D, shares authorized	100,000	100,000
Preferred stock: Series D, shares issued	0	0
Preferred stock: Series D, shares outstanding	0	0