Borrowings (Details) - Schedule of Interest Expense, Amortized Debt Issuance Costs, Weighted Average Stated Interest Rate and Weighted Average Outstanding Debt - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
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	$ 1,390
Commitment fees	56
Amortization of deferred financing costs	287
Amortization of debt issuance costs	370	368	367
Total	5,532	5,113	5,800
Weighted average debt outstanding	81,600	85,398	82,930
2021 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			668
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	410	1,749	4,768
2023 Notes Premium [Member]
Borrowings (Details) - Schedule of Interest Expense, Amortized Debt Issuance Costs, Weighted Average Stated Interest Rate and Weighted Average Outstanding Debt [Line Items]
Notes Premium			(3)
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	$ 3,019	$ 2,996
Weighted average stated interest rate [Member]
Borrowings (Details) - Schedule of Interest Expense, Amortized Debt Issuance Costs, Weighted Average Stated Interest Rate and Weighted Average Outstanding Debt [Line Items]
Weighted average stated interest rate	5.90%	6.00%	7.00%

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The amount of debt instrument weighted average outstanding balance.

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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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Represents the charge against earnings during the period for commitment fees and debt issuance expenses.

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Weighted average interest rate of debt outstanding.

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Aggregate amount of interest expense on all borrowings.

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