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Borrowings (Details) - USD ($)																	9 Months Ended
Borrowings (Details) - USD ($)	Jun. 30, 2024	May 02, 2024	Feb. 21, 2024	Sep. 30, 2023	Dec. 15, 2022	Dec. 15, 2022	Sep. 30, 2022	Dec. 16, 2021	Nov. 15, 2021	Nov. 09, 2021	Dec. 31, 2018	Mar. 31, 2018	Mar. 10, 2018	Dec. 12, 2016	Mar. 26, 2013	Mar. 18, 2013	Jun. 30, 2024	Jun. 30, 2023	Dec. 30, 2023	Jan. 17, 2023	Sep. 30, 2013	Jun. 30, 2013	Mar. 30, 2013
Borrowings [Line Items]
Asset coverage percentage	277.80%			270.70%													277.80%
Asset coverage percentage with no approval												200.00%
Revolving credit facility in terms					3 years
Revolving credit facility					$ 50,000,000
Outstanding credit facility	$ 27,600,000			$ 28,400,000
Interest rate				100.00%			100.00%										2.90%
Commitment fee percentage																	0.25%
Borrowed																				$ 23,200,000
Aggregate principal amount	$ 86,734,000			$ 85,942,000													$ 86,734,000			$ 22,600,000
Aggregate principal amount						$ 22,521,800											$ 21,971,498	$ 32,241,942
Percentage of issued principal payment		5.25%
Principal amount		$ 1,661,498
Unsecured Debt [Member] \| 2023 Notes [Member]
Borrowings [Line Items]
Interest rate																6.125%
Aggregate principal amount								$ 55,325,000	$ 55,325,000		$ 12,000,000		$ 13,000,000	$ 40,000,000	$ 3,500,000	$ 60,000,000
Maturity date																Mar. 30, 2023
Percentage of unsecured notes																			6.125%		6.125%	6.125%	6.125%
Sale of debt (in Shares)														1,573,872
Redemption price per share (in Dollars per share)														$ 25.03
Net proceeds														$ 38,600,000
Gain (loss) on extinguishment of debt								$ 300,000					$ 300,000
Unsecured Debt [Member] \| 2028 Notes [Member]
Borrowings [Line Items]
Interest rate										5.25%
Aggregate principal amount										$ 57,500,000
Maturity date										Nov. 01, 2028
Maximum [Member]
Borrowings [Line Items]
Asset coverage percentage												200.00%
Aggregate principal amount			$ 62,500,000
Minimum [Member]
Borrowings [Line Items]
Asset coverage percentage												150.00%
Asset coverage percentage with no approval																	200.00%
Aggregate principal amount			$ 12,500,000
Borrowings [Member]
Borrowings [Line Items]
Asset coverage percentage	200.00%																200.00%
Underwriters [Member] \| 2028 Notes [Member]
Borrowings [Line Items]
Aggregate principal amount										$ 7,500,000