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Accounts and Financing Receivables - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Sep. 30, 2020
Sep. 30, 2018
Sep. 30, 2019
Accounts Notes And Loans Receivable [Line Items]        
Reversal of operating lease receivable   $ 8,000,000.0    
Charge to rental revenue   8,000,000.0    
Value of notes with customer   $ 184,000   $ 3,472,000
Promissory notes receivable maturity month and year   2023-01    
Term of sales-type lease   3 years    
Manufactured Rental Equipment        
Accounts Notes And Loans Receivable [Line Items]        
Promissory notes receivable maximum interest rate   7.00%    
Product        
Accounts Notes And Loans Receivable [Line Items]        
Partially financed product sale $ 12,500,000      
Secured Promissory Note        
Accounts Notes And Loans Receivable [Line Items]        
Value of notes with customer $ 10,000,000.0      
Term of the notes 3 years      
Interest rate of the notes 7.00%      
Monthly principal and interest payments $ 300,000      
Frequency of payments monthly monthly    
Senior Secured Bond        
Accounts Notes And Loans Receivable [Line Items]        
Transition of unpaid invoices and late fee into debt securities   $ 13,000,000.0    
Debt instrument, face value   13,000,000.0    
Single Customer        
Accounts Notes And Loans Receivable [Line Items]        
Operating lease receivable carrying value   0    
Proceeds from contract customers   $ 8,100,000    
Received cash payment in excess     $ 24,000,000