Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Jun. 30, 2015
Preferred stock, par value (per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A Common Stock [Member]
Common stock, par value (per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	17,831,256	17,690,874
Common stock, shares, outstanding	17,831,256	17,690,874
Class B Common Stock [Member]
Common stock, par value (per share)	$ 0.01	$ 0.01
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	20	23
Common stock, shares, outstanding	20	23