Fair Value Measurements (Details) - Schedule of Quantitative Information About Level 3 Fair Value Measurements of Our Investments - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 163,919	$ 165,316
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 68,020	$ 69,943
Valuation Methodology	Income Approach	Income Approach
Unobservable Input	Market Yield	Market Yield
Range (Weighted Average)	(14.88%)	(13.78%)
Impact to Valuation From An Increase In Input	Decrease	Decrease
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	9.0%	8.50%
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	36.0%	32.0%
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans One [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 13,520	$ 751
Valuation Methodology	Market Approach	Market Approach
Unobservable Input	EBITDA Multiple	Revenue Multiple
Range (Weighted Average)	(2.8	(0.3
Impact to Valuation From An Increase In Input	Increase	Increase
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans One [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	1.6	0.3
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans One [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	5.0	0.3
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans Two [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 856	$ 10,939
Valuation Methodology	Market Approach	Market Approach
Unobservable Input	LTM EBITDA Multiple	EBITDA Multiple
Range (Weighted Average)	(6.8	(3.1
Impact to Valuation From An Increase In Input	Increase	Increase
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans Two [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	6.3	1.7
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans Two [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	7.3	5.0
Fair Value, Inputs, Level 3 [Member] \| Equity Warrants [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 36,411	$ 38,870
Valuation Methodology	Cost Approach	Cost Approach
Unobservable Input	Collateral Value	Collateral Value
Impact to Valuation From An Increase In Input	N/A	N/A
Fair Value, Inputs, Level 3 [Member] \| Equity Warrants [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	N/A	N/A
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants One [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 10,759	$ 11,734
Valuation Methodology	Market Approach	Market Approach
Unobservable Input	LTM Multiple	LTM Multiple
Range (Weighted Average)	(6.8	(6.3
Impact to Valuation From An Increase In Input	Increase	Increase
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants One [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	6.3	5.8
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants One [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	7.3	6.8
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Two [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 34,124	$ 22,007
Valuation Methodology	Market Approach	Market Approach
Unobservable Input	EBITDA Multiple	EBITDA Multiple
Range (Weighted Average)	(4.1	(2.8
Impact to Valuation From An Increase In Input	Increase	Increase
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Two [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	1.3	1.8
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Two [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	36.8	36.8
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Three [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 229	$ 10,000
Valuation Methodology	Income Approach	Recent Purchase
Unobservable Input	DLOM (Discount for lack of Marketability)	Purchase Price
Range (Weighted Average)	(3.1
Impact to Valuation From An Increase In Input	Decrease	N/A
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Three [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	3.0
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Three [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	3.1	N/A – N/A (N/A)
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans Three [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 866
Valuation Methodology		Market Approach
Unobservable Input		LTM EBITDA Multiple
Range (Weighted Average)		(6.3
Impact to Valuation From An Increase In Input		Increase
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans Three [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)		5.8
Fair Value, Inputs, Level 3 [Member] \| Senior Secured First Lien Term Loans Three [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)		6.8
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Four [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 206
Valuation Methodology		Income Approach
Unobservable Input		DLOM (Discount for lack of Marketability)
Range (Weighted Average)		(3.1
Impact to Valuation From An Increase In Input		Decrease
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Four [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)		3.0
Fair Value, Inputs, Level 3 [Member] \| Equity/Warrants Four [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)		3.2