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Consolidated Balance Sheets (Parenthetical) - USD ($)
 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000,000 5,000,000
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, issued shares 33,087,308 32,907,863
Common stock, outstanding shares 33,087,308 32,907,863
Series A Cumulative Preferred Stock    
Preferred stock, shares authorized 1,000,000
Cumulative Preferred Stock (as a percent) 8.50%
Preferred stock, shares issued 317,319
Preferred stock, shares outstanding 317,319
Preferred stock, total liquidation preference (in dollars) $ 7,932,975
Preferred stock, liquidation preference (in dollars per share) $ 25.00