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Consolidated Balance Sheets (Parentheticals) - $ / shares
Dec. 31, 2016
Jun. 30, 2016
Statement of Financial Position [Abstract]    
Preferred stock par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock authorized shares 10,000,000 10,000,000
Preferred stock issued shares 0 0
Preferred stock shares outstanding 0 0
Common stock par value (in dollars per share) $ 0.01 $ 0.01
Common stock shares authorized 60,000,000 60,000,000
Common stock shares issued 18,000,750 17,998,750
Common stock shares outstanding 18,000,750 17,998,750