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Summary of Significant Accounting Policies, Income Taxes (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Income Taxes [Abstract]          
Federal corporate tax rate 21.00% 35.00% 31.50% 35.00% 35.00%