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Consolidated Schedule of Investments - Summary of Derivatives (Parenthetical) | 12 Months Ended
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Dec. 31, 2022 USD ($) NumberOfShares $ / shares | Dec. 31, 2021 USD ($) NumberOfShares $ / shares
Schedule of Investments [Line Items] |  |
Notional amount | $ 571,000 | $ 5,658,000
Unrealized gain(loss) | 2,412,000 | (1,303,000)
Call Option |  |
Schedule of Investments [Line Items] |  |
Notional amount | 8,000 | 8,000
Unrealized gain(loss) | $ (10,000) | $ (2,000)
Call Option | HDNet Holdco LLC |  |
Schedule of Investments [Line Items] |  |
Number of shares | NumberOfShares | 200 | 200
Notional amount | $ 8,000 | $ 8,000
Exercise price | $ / shares | $ 0.01 | $ 0.01
Value |  | $ 10,000
Put Option |  |
Schedule of Investments [Line Items] |  |
Notional amount | $ 563,000 | 150,000
Put Option | Coastal Screen and Rail |  |
Schedule of Investments [Line Items] |  |
Notional amount |  | $ 150,000
Exercise price | $ / shares |  | $ 400,000
Expiration date |  | Aug. 31, 2022
Put Option | Advantage Capital Holdings LLC |  |
Schedule of Investments [Line Items] |  |
Number of shares | NumberOfShares | 164 |
Notional amount | $ 563,000 |
Exercise price | $ / shares | $ 20 |
Expiration date | May 13, 2023 |
Securities Swap and Option Agreement |  |
Schedule of Investments [Line Items] |  |
Notional amount |  | $ 5,500,000
Unrealized gain(loss) | $ 2,422,000 | $ (1,301,000)
Securities Swap and Option Agreement | Advantage Capital Holdings LLC |  |
Schedule of Investments [Line Items] |  |
Percentage of payments made for paid in kind |  | 18.00%
Percentage of payments received in cash |  | 16.00%
Notional amount |  | $ 5,500,000
Value |  | $ 2,422,000
Expiration date |  | Sep. 15, 2024
Unrealized gain(loss) |  | $ (2,422,000)

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