Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Jun. 30, 2018
Sep. 30, 2017
Income Tax Expense (Benefit) [Line Items]    
Benefit from change in corporate income tax rate $ 1.2  
Corporate income tax rate 21.00% 35.00%
Maximum [Member] | 2022 to 2037 [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating Loss Carryforwards, Expiration Date Jan. 01, 2022  
Minimum [Member] | 2022 to 2037 [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating Loss Carryforwards, Expiration Date Jan. 01, 2037  
Foreign Tax Authority [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards $ 62.2  
Federal [Member] | 2022 to 2037 [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards 10.5  
State [Member] | 2022 to 2037 [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards $ 15.5