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Borrowings (Details) - Schedule of interest expense, amortized debt issuance costs, weighted average stated interest rate and weighted average outstanding debt - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Borrowings (Details) - Schedule of interest expense, amortized debt issuance costs, weighted average stated interest rate and weighted average outstanding debt [Line Items]        
Credit facility interest $ 353 $ 353
Amortization of debt issuance costs 101 121 204 163
Total $ 1,298 $ 1,221 $ 2,501 $ 2,709
Weighted average stated interest rate 6.00% 6.20% 5.70% 6.00%
Weighted average outstanding balance $ 80,606 $ 80,022 $ 80,311 $ 90,863
2023 Notes Interest [Member]        
Borrowings (Details) - Schedule of interest expense, amortized debt issuance costs, weighted average stated interest rate and weighted average outstanding debt [Line Items]        
Notes Interest 65 345 820 1,060
2028 Notes Interest [Member]        
Borrowings (Details) - Schedule of interest expense, amortized debt issuance costs, weighted average stated interest rate and weighted average outstanding debt [Line Items]        
Notes Interest $ 779 $ 755 $ 1,124 $ 1,486