Investments - Consolidated Statements of Assets and Liabilities for PSLF (Details) - USD ($) $ in Thousands	Sep. 30, 2025		Sep. 30, 2024
Assets
Investments at fair value (amortized cost - $1,289,319 and $1,036,305 respectively)	$ 1,287,273	[1],[2]	$ 1,328,050	[3],[4],[5]
Cash and cash equivalents (cost - $40,985 and $36,595, respectively)	51,783		49,861
Interest receivable	5,261		5,261
Prepaid expenses and other assets	375		269
Total assets	1,349,554		1,389,086
Liabilities
Credit facility payable	425,477		460,361
Interest payable on subordinated notes to members	6,281		6,406
Total liabilities	885,604		895,178
Commitments and contingencies (See Note 11)
Total liabilities and members' equity	1,349,554		1,389,086
PSLF
Assets
Investments at fair value (amortized cost - $1,289,319 and $1,036,305 respectively)	1,265,901		1,031,225	[6],[7],[8]
Cash and cash equivalents (cost - $40,985 and $36,595, respectively)	40,985		36,595
Receivable for investments sold	1,055
Interest receivable	5,271		5,089
Prepaid expenses and other assets	2,148		372
Due from affiliates	87		71
Total assets	1,315,447		1,073,352
Liabilities
Subordinated notes payable to members	250,808		191,546
Credit facility payable	99,600		247,600
Payable for investments purchased	0		7,314
Interest payable on credit facility and asset backed debt	13,730		12,525
Distribution payable to members	8,000		8,000
Interest payable on subordinated notes to members	5,305		4,372
Accounts payable and accrued expenses	1,189		934
Due to affiliate	50		0
Total liabilities	1,194,421		961,081
Members' equity	121,026	[9]	112,271
Total liabilities and members' equity	1,315,447		1,073,352
PSLF | 2035 Asset-backed debt
Liabilities
Asset-backed debt, net	244,566		244,118
PSLF | 2037 Asset-backed debt
Liabilities
Asset-backed debt, net	326,113		0
PSLF | 2034 Asset-backed debt
Liabilities
Asset-backed debt, net	$ 245,060		$ 244,672

[1] All investments are in US Companies unless noted otherwise. Total cost, fair value, and percentage of Net Assets for the U.S. Companies were $1,181.8 million, $1,198.6 million, and 258.4%

[2] Valued based on our accounting policy (See Note 2).

[3] The provisions of the 1940 Act classify investments based on the level of control that we maintain in a particular portfolio company. As defined in the 1940 Act, a company is generally presumed to be “non-controlled” when we own 25% or less of the portfolio company’s voting securities and “controlled” when we own more than 25% of the portfolio company’s voting securities.

[4] The provisions of the 1940 Act classify investments further based on the level of ownership that we maintain in a particular portfolio company. As defined in the 1940 Act, a company is generally deemed as “non-affiliated” when we own less than 5% of a portfolio company’s voting securities and “affiliated” when we own 5% or more of a portfolio company’s voting securities (See Note 6).

[5] Valued based on our accounting policy (See Note 2).

[6] All of our investments are not registered under the 1933 Act and have restrictions on resale.

[7] As of September 30, 2024, all investments are in US Companies. Total cost, fair value, and percentage of Net Assets for U.S. Companies were $1,036.3 million, $1,031.2 million and 918.5%

[8] Valued based on PSLF’s accounting policy.

[9] Valued based on PSLF’s accounting policy.