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Accounts and Long-Term Receivable (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable $ 22,128   $ 22,128   $ 22,993
Long-term receivable 6,705   6,705   7,412
Payments to be received from transaction over next two years     $ 3,000    
Minimum          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Maturity term of accounts and long term receivables     1 year    
Financing receivables          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable 8,700   $ 8,700   8,900
Long-term receivable $ 6,700   $ 6,700   7,400
Long term receivables interest rate 5.00%   5.00%    
Amount of allowance for credit losses or impairments with a contractual maturity of over one year $ 0   $ 0   0
Accounts and long-term receivable past due 0   0   $ 0
Activity in allowance for credit losses for accounts and long-term receivables 0 $ 0      
Construction Contractor, Receivable, Excluding Contract Retainage, Fiscal Year Maturity [Abstract]          
2023 6,924   6,924    
2024 6,859   6,859    
2025 2,313   2,313    
Total payments 16,096   16,096    
Less: unearned interest income (654)   (654)    
Total, net of unearned interest income 15,442   $ 15,442    
Financing receivables | Minimum          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Maturity term of accounts and long term receivables     1 year    
Financing receivables | Other Income          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts And Long Term Receivable, Interest Income $ 189 $ 122 $ 371 $ 261