Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

v3.20.1
Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 6 Months Ended
Mar. 31, 2020
Sep. 30, 2019
Income Tax Expense (Benefit) [Line Items]    
Corporate income tax rate 21.00%  
Alternative Minimum Tax [Member]    
Income Tax Expense (Benefit) [Line Items]    
Tax credit carryforward $ 0.5  
Minimum [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards, expiration date Dec. 31, 2022  
Maximum [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards, expiration date Dec. 31, 2038  
Domestic [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards   $ 42.7
Domestic [Member] | 2022 to 2038 [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards   14.4
Domestic [Member] | Indefinite [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards   28.3
State [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards   25.4
State [Member] | 2022 to 2038 [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards   20.5
State [Member] | Indefinite [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards   4.9
Foreign [Member] | Indefinite [Member]    
Income Tax Expense (Benefit) [Line Items]    
Operating loss carryforwards   $ 61.7