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Income Taxes (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Operating Loss Carryforwards [Line Items]      
Effective Income Tax Rate Reconciliation, Percent   30.00% 33.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent 7.00% 5.25%  
Unrecognized Tax Benefits   $ 4.3  
Decrease in income tax expenses unrecognized tax benefits if recognized   $ 4.3