Annual report pursuant to Section 13 and 15(d)

Accounts Receivable and Concentration of Credit Risk (Narrative) (Details)

v3.22.2.2
Accounts Receivable and Concentration of Credit Risk (Narrative) (Details)
$ in Millions
 12 Months Ended
Sep. 30, 2022
USD ($)
customer
Sep. 30, 2021
customer
Minimum [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Credit terms 30 days  
Maximum [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Credit terms 120 days  
Accounts Receivable And Long-Term Trade Receivables [Member] | Customer Concentration Risk [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of customers 2  
Assets, Current [Member] | Customer Concentration Risk [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of customers 0 0
Accounts Receivable [Member] | Customer Concentration Risk [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of customers   3
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage   90.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Two Customers [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage 83.00%  
Total Revenue [Member] | Customer Concentration Risk [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of customers 2 2
Total Revenue [Member] | Customer Concentration Risk [Member] | Three Customers [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage   75.00%
Total Revenue [Member] | Customer Concentration Risk [Member] | Two Customers [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage 73.00%  
Brazil [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Credit terms 90 days  
Long term trade receivable | $ $ 0.7