Fair Value Measurement and Disclosures - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	$ 181,840,000		$ 88,221,000
Transfers into Level III	0
Transfers out of Level III	$ 0
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Debt and Equity Securities, Unrealized Gain (Loss)
Unrealized gain (loss) on investments	$ (189,000)
Net Income (Loss)	8,784,000
Series I
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net Income (Loss)	1,663,000
Series II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net Income (Loss)	7,121,000
MAST
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net Income (Loss)	10,965,000	$ 0
MAST | Series I
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net Income (Loss)	2,390,000	0
MAST | Series II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net Income (Loss)	7,139,000	$ 0
MAST | Series I and II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net Income (Loss)	9,529,000
Series I
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	$ 43,391,000		25,647,000
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Debt and Equity Securities, Unrealized Gain (Loss)
Unrealized gain (loss) on investments	$ 95,000
Series II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	$ 138,449,000		62,574,000
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Debt and Equity Securities, Unrealized Gain (Loss)
Unrealized gain (loss) on investments	$ (284,000)
Level I | Money Market Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	2,801,000		51,783,000
Level I | Series I
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1,059,000		14,594,000
Level I | Series II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1,742,000		37,189,000
Level III
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	171,739,000		64,377,000
Transfers out of Level III	(94,000)
Unrealized gain (loss) on investments	(190,000)
Level III | Series I
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	40,982,000		18,715,000
Transfers out of Level III	(27,000)
Unrealized gain (loss) on investments	95,000
Level III | Series II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	130,757,000		$ 45,662,000
Transfers out of Level III	(67,000)
Unrealized gain (loss) on investments	$ (285,000)