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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Income Tax Disclosure [Line Items]    
Nondeductible executive compensation $ 1.0  
Foreign Tax Authority    
Income Tax Disclosure [Line Items]    
Net operating loss carryforwards 3.3 $ 3.3
Foreign Tax Authority | Canadian Tax Authority    
Income Tax Disclosure [Line Items]    
Total reassessments including interest 167.0  
Amount of security posted in the form of a performance bond 134.3  
Amount of security posted in the form of cash 38.8 38.8
State and Local | NOL carryforwards expire beginning in 2027    
Income Tax Disclosure [Line Items]    
Net operating loss carryforwards $ 0.3 $ 0.3