Annual report pursuant to Section 13 and 15(d)

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

v3.21.2
Accounts Receivable and Concentration of Credit Risk (Narrative) (Details) - customer
 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
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  
Assets, Current [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of customers 0 0
Accounts Receivable [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of customers 3 3
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage 90.00% 89.00%
Total Revenue [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of customers 2 3
Total Revenue [Member] | Customer Concentration Risk [Member] | Three Customers [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage   76.00%
Total Revenue [Member] | Customer Concentration Risk [Member] | Two Customers [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage 75.00%  
Brazil [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Credit terms 90 days