Investments and Fair Value Measurements - Summary of Fair Value of Investments by Major Class Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	$ 169,613	$ 172,290
Level 3
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	165,665	168,137
NAV
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	3,948	4,153
First Lien Debt
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	114,600	111,460
First Lien Debt \| Level 3
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	114,600	111,460
Second Lien Debt
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	9,119	9,051
Second Lien Debt \| Level 3
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	9,119	9,051
Subordinated Debt
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	23,040	22,858
Subordinated Debt \| Level 3
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	23,040	22,858
Collateralized Loan Obligations
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	572	940
Collateralized Loan Obligations \| Level 3
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	572	940
Joint Venture
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	3,948	4,153
Joint Venture \| NAV
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	3,948	4,153
Equity
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	18,334	23,828
Equity \| Level 3
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	$ 18,334	$ 23,828

Logan Ridge Finance Corp. 10-Q