Affiliates and Controlled Investments - Schedule of Fair Value with Transactions in Affiliated investments and controlled investments (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||||||||||||
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Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Schedule of Investments [Line Items] | ||||||||||||||
| Fair Value, Beginning Balance | [1],[2] | $ 331,071 | ||||||||||||
| Fair Value, Ending Balance | [3] | $ 272,252 | 272,252 | |||||||||||
| Interest Income | 6,157 | $ 7,969 | 12,877 | $ 15,935 | ||||||||||
| Dividend Income | 4,617 | $ 6,236 | 7,322 | $ 9,848 | ||||||||||
| Controlled Investments | ||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||
| Fair Value, Beginning Balance | [4] | 79,887 | ||||||||||||
| Gross Additions | [4],[5] | 6,450 | ||||||||||||
| Change in Unrealized Appreciation (Depreciation) | [4] | (5,341) | ||||||||||||
| Fair Value, Ending Balance | [4] | 80,996 | 80,996 | |||||||||||
| Interest Income | [4] | 1,711 | ||||||||||||
| Dividend Income | [4] | 5,115 | ||||||||||||
| Controlled Investments | Great Elm Specialty Finance | ||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||
| Fair Value, Beginning Balance | [4] | 38,462 | ||||||||||||
| Gross Additions | [4],[5] | 3,550 | ||||||||||||
| Change in Unrealized Appreciation (Depreciation) | [4] | (1,500) | ||||||||||||
| Fair Value, Ending Balance | [4] | 40,512 | 40,512 | |||||||||||
| Interest Income | [4] | 1,711 | ||||||||||||
| Dividend Income | [4] | 56 | ||||||||||||
| Controlled Investments | Great Elm Specialty Finance | Equity | ||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||
| Fair Value, Beginning Balance | [4] | 13,137 | ||||||||||||
| Change in Unrealized Appreciation (Depreciation) | [4] | (1,500) | ||||||||||||
| Fair Value, Ending Balance | [4] | 11,637 | 11,637 | |||||||||||
| Interest Income | [4] | 0 | ||||||||||||
| Dividend Income | [4] | 56 | ||||||||||||
| Controlled Investments | Great Elm Specialty Finance | Subordinated Note | ||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||
| Fair Value, Beginning Balance | [4] | 25,325 | ||||||||||||
| Gross Additions | [4],[5] | 3,550 | ||||||||||||
| Fair Value, Ending Balance | [4] | 28,875 | 28,875 | |||||||||||
| Interest Income | [4] | 1,711 | ||||||||||||
| Controlled Investments | CLO Formation JV, LLC | ||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||
| Fair Value, Beginning Balance | [4] | 41,425 | ||||||||||||
| Change in Unrealized Appreciation (Depreciation) | [4] | (3,841) | ||||||||||||
| Fair Value, Ending Balance | [4] | 37,584 | 37,584 | |||||||||||
| Dividend Income | [4] | 5,059 | ||||||||||||
| Controlled Investments | CLO Formation JV, LLC | Equity | ||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||
| Fair Value, Beginning Balance | [4] | 41,425 | ||||||||||||
| Change in Unrealized Appreciation (Depreciation) | [4] | (3,841) | ||||||||||||
| Fair Value, Ending Balance | [4] | 37,584 | 37,584 | |||||||||||
| Dividend Income | [4] | 5,059 | ||||||||||||
| Controlled Investments | Alpha Edison Quantum II, LLC | ||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||
| Gross Additions | [4] | 2,900 | ||||||||||||
| Fair Value, Ending Balance | [4] | 2,900 | 2,900 | |||||||||||
| Controlled Investments | Alpha Edison Quantum II, LLC | Equity | ||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||
| Gross Additions | [4] | 2,900 | ||||||||||||
| Fair Value, Ending Balance | [4] | $ 2,900 | $ 2,900 | |||||||||||
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- Definition Amount of operating dividend income on securities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Fair value of investment in security owned. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Gross additions to the investment in and advance to the affiliate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase (decrease) in the investments in and advances to affiliates. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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