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Income Taxes (Tables)
9 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]  
Summary of total tax expense and effective income tax rate
    Three Months Ended March 31,     Nine Months Ended March 31,  
    2018     2017     2018     2017  
Income before income taxes   $ 1,043,125     $ 366,598     $ 1,548,646     $ 2,110,587  
Income tax expense (benefit)   $ (183,154 )   $ 265,774     $ (318,678 )   $ 771,600  
Effective income tax rate     -18 %     72 %     -21 %     37 %