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Income Taxes - Balance Sheet Items (Details) - USD ($)
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Income Tax Disclosure [Abstract]      
Current deferred tax asset $ 0 $ 105,321 $ 82,414
Non-current deferred tax liability 15,826,291 11,840,693 11,242,551
Net liability $ 15,826,291 $ 11,735,372 $ 11,160,137