CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Dec. 31, 2016	Jun. 30, 2016
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	16,000,000	16,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	18,529,095	18,519,757
Common stock, shares outstanding	18,529,095	18,519,757
Class B common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	20,887,811	20,887,811
Common stock, shares outstanding	20,887,811	20,887,811