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Investments - Company Portfolio by Security and Investment (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
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Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 481,737 | $ 476,432
Fair Value |  | $ 406,423 | $ 405,021
Fair Value Percentage of Total Portfolio |  | 100.00% | 100.00%
Services: Business |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 58,138 | $ 55,141
Fair Value |  | $ 54,510 | $ 51,776
Fair Value Percentage of Total Portfolio |  | 13.40% | 12.80%
High Tech Industries |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 57,635 | $ 55,932
Fair Value |  | $ 50,657 | $ 50,138
Fair Value Percentage of Total Portfolio |  | 12.50% | 12.40%
Joint Venture |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 65,883 | $ 66,747
Fair Value |  | $ 50,491 | $ 54,153
Fair Value Percentage of Total Portfolio |  | 12.40% | 13.40%
Banking, Finance, Insurance & Real Estate |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 44,975 | $ 44,191
Fair Value |  | $ 43,541 | $ 42,854
Fair Value Percentage of Total Portfolio |  | 10.70% | 10.60%
Healthcare & Pharmaceuticals |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 43,340 | $ 43,882
Fair Value |  | $ 42,261 | $ 41,872
Fair Value Percentage of Total Portfolio |  | 10.40% | 10.30%
Consumer goods: Durable |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 28,701 | $ 28,493
Fair Value |  | $ 26,666 | $ 27,028
Fair Value Percentage of Total Portfolio |  | 6.60% | 6.70%
Media: Broadcasting & Subscription |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 24,338 | $ 19,095
Fair Value |  | $ 16,769 | $ 12,972
Fair Value Percentage of Total Portfolio |  | 4.10% | 3.20%
Finance |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 14,916 | $ 14,815
Fair Value |  | $ 14,862 | $ 14,725
Fair Value Percentage of Total Portfolio |  | 3.70% | 3.60%
Machinery (Non-Agrclt/Constr/Electr) |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 11,124 | $ 11,705
Fair Value |  | $ 14,327 | $ 13,608
Fair Value Percentage of Total Portfolio |  | 3.50% | 3.40%
Beverage, Food and Tobacco |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 12,574 | $ 12,563
Fair Value |  | $ 11,577 | $ 11,612
Fair Value Percentage of Total Portfolio |  | 2.80% | 2.90%
Aerospace and Defense |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 10,841 | $ 11,403
Fair Value |  | $ 10,795 | $ 11,390
Fair Value Percentage of Total Portfolio |  | 2.70% | 2.80%
Chemicals, Plastics and Rubber |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 11,084 | $ 10,135
Fair Value |  | $ 10,530 | $ 9,628
Fair Value Percentage of Total Portfolio |  | 2.60% | 2.40%
Transportation: Consumer |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 7,396 | $ 7,410
Fair Value |  | $ 7,459 | $ 7,470
Fair Value Percentage of Total Portfolio |  | 1.80% | 1.80%
Interactive Media & Services |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 7,090 | $ 2,539
Fair Value |  | $ 7,078 | $ 2,559
Fair Value Percentage of Total Portfolio |  | 1.70% | 0.60%
Retail |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 10,255 | $ 10,246
Fair Value |  | $ 6,610 | $ 6,853
Fair Value Percentage of Total Portfolio |  | 1.60% | 1.70%
Healthcare, Education and Childcare |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 6,098 | $ 6,114
Fair Value |  | $ 6,099 | $ 6,115
Fair Value Percentage of Total Portfolio |  | 1.50% | 1.50%
Metals & Mining |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 9,950 | $ 9,950
Fair Value |  | $ 5,178 | $ 5,103
Fair Value Percentage of Total Portfolio |  | 1.30% | 1.30%
CLO Fund Securities |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 3,800 | $ 5,318
Fair Value |  | $ 4,639 | $ 5,193
Fair Value Percentage of Total Portfolio |  | 1.10% | 1.30%
IT Consulting & Other Services |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 4,128 | $ 2,157
Fair Value |  | $ 4,222 | $ 2,243
Fair Value Percentage of Total Portfolio |  | 1.00% | 0.50%
Transportation: Cargo |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 4,364 | $ 4,223
Fair Value |  | $ 3,504 | $ 3,782
Fair Value Percentage of Total Portfolio |  | 0.90% | 0.90%
Containers, Packaging and Glass |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 2,727 | $ 2,728
Fair Value |  | $ 2,703 | $ 2,702
Fair Value Percentage of Total Portfolio |  | 0.70% | 0.70%
Energy: Electricity |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 2,696 | $ 2,696
Fair Value |  | $ 2,696 | $ 2,702
Fair Value Percentage of Total Portfolio |  | 0.70% | 0.70%
Services: Consumer |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 2,729 | $ 2,699
Fair Value |  | $ 2,326 | $ 2,406
Fair Value Percentage of Total Portfolio |  | 0.60% | 0.60%
Hotel, Gaming & Leisure |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 7,006 | $ 7,006
Fair Value |  | $ 2,205 | $ 2,205
Fair Value Percentage of Total Portfolio |  | 0.50% | 0.50%
Construction & Building |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 1,437 | $ 7,648
Fair Value |  | $ 1,425 | $ 7,596
Fair Value Percentage of Total Portfolio |  | 0.40% | 1.90%
Capital Equipment |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 8,016 | $ 8,016
Fair Value |  | $ 1,299 | $ 1,291
Fair Value Percentage of Total Portfolio |  | 0.30% | 0.30%
Application Software |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 1,164 | $ 1,165
Fair Value |  | $ 1,162 | $ 1,166
Fair Value Percentage of Total Portfolio |  | 0.30% | 0.20%
Telecommunications |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 1,541 | $ 1,541
Fair Value |  | $ 832 | $ 805
Fair Value Percentage of Total Portfolio |  | 0.20% | 0.20%
Diversified Financial Services |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  |  | $ 3,058
Fair Value |  |  | $ 3,074
Fair Value Percentage of Total Portfolio |  | 0.00% | 0.80%
Asset Management Company |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost | [1] | $ 17,791 | $ 17,791
Fair Value Percentage of Total Portfolio | [1] | 0.00% | 0.00%
Energy: Oil & Gas |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  |  | $ 25
Fair Value Percentage of Total Portfolio |  | 0.00% | 0.00%
First Lien Debt |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 318,953 | $ 311,673
Fair Value |  | $ 294,379 | $ 289,957
Fair Value Percentage of Total Portfolio |  | 72.40% | 71.60%
Second Lien Debt |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 35,147 | $ 34,892
Fair Value |  | $ 28,724 | $ 28,996
Fair Value Percentage of Total Portfolio |  | 7.10% | 7.20%
Subordinated Debt |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 8,034 | $ 8,059
Fair Value |  | $ 1,740 | $ 1,740
Fair Value Percentage of Total Portfolio |  | 0.40% | 0.40%
Collateralized Loan Obligations |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 3,800 | $ 5,318
Fair Value |  | $ 4,639 | $ 5,193
Fair Value Percentage of Total Portfolio |  | 1.10% | 1.30%
Joint Ventures |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 65,883 | $ 66,747
Fair Value |  | $ 50,491 | $ 54,153
Fair Value Percentage of Total Portfolio |  | 12.40% | 13.40%
Equity |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 32,098 | $ 31,921
Fair Value |  | $ 26,218 | $ 24,762
Fair Value Percentage of Total Portfolio |  | 6.50% | 6.10%
Asset Manager Affiliates |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost | [2] | $ 17,791 | $ 17,791
Derivatives |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | 31 | 31
Fair Value |  | $ 232 | $ 220
Fair Value Percentage of Total Portfolio |  | 0.10% |
[1] | Represents the equity investment in the Asset Manager Affiliates
[2] | Represents the equity investment in the Asset Manager Affiliates.

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