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Consolidated Condensed Balance Sheets (Unaudited) (Parenthetical) - USD ($)
 6 Months Ended 12 Months Ended
Dec. 31, 2016
Jun. 30, 2016
Preferred stock, liquidation preference (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, shares outstanding 33,062,297 32,907,863
Common stock, shares issued 33,062,297 32,907,863
Series A Cumulative Preferred Stock    
Preferred stock, shares authorized 1,000,000 1,000,000
Cumulative Preferred Stock (as a percent) 8.50% 8.50%
Preferred stock, shares issued 317,319 317,319
Preferred stock, shares outstanding 0 317,319
Preferred stock, total liquidation preference (in dollars)   $ 7,932,975