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Acquisitions of Garrison Capital Inc. And Harvest Capital Credit Corporation (Additional Information) (Details) - USD ($) | Jun. 09, 2021 | Oct. 28, 2020 | Sep. 30, 2022 | Jun. 30, 2022 | [1] | Mar. 31, 2022 | [3] | Dec. 31, 2021 | Jul. 23, 2021 | Jun. 24, 2021
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Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Common stock, issued |  |  |  | 9,906,833 |  |  | 9,867,998 |  |
Common stock, par value |  |  |  | $ 0.01 |  |  | $ 0.01 |  |
Aggregate principal amount | [2] |  |  |  | $ 364,934,000 | $ 352,434,000 |  |  |
HCAP Notes |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 28,750,000 |  |  |  |  |  |  |
Debt Instrument redemption, amount |  |  |  |  |  |  |  | $ 28,750,000 | $ 28,750,000
GARS Acquisition |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Share value in cash |  |  | $ 1.19 |  |  |  |  |  |
Common stock, issued |  |  | 1.917 |  |  |  |  |  |
Common stock, par value |  |  | $ 1.26 |  |  |  |  |  |
Additional consideration funded by adviser |  |  | $ 0.31 |  |  |  |  |  |
Cash payment, (deemed capital contribution) |  |  | $ 5,000,000.0 |  |  |  |  |  |
GARS Acquisition | Common Stock |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Common stock, issued |  |  | 30,765,640 |  |  |  |  |  |
Common stock, par value |  |  | $ 0.01 |  |  |  |  |  |
HCAP Acquisition |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Common stock, par value |  | $ 2.43 |  |  |  |  |  |  |
Cash purchase price |  | $ 18,537,512.65 |  |  |  |  |  |  |
Cash payment, (deemed capital contribution) |  | $ 2,150,000 |  |  |  |  |  |  |
Business acquisition, number of shares issued |  | 15,252,453 |  |  |  |  |  |  |
Number of electing shares converted to non-electing shares |  | 475,806 |  |  |  |  |  |  |
Cash received for each electing shares |  | $ 7.43 |  |  |  |  |  |  |
Shares received for each electing shares |  | $ 0.74 |  |  |  |  |  |  |
Shares received for each non-electing shares |  | $ 3.86 |  |  |  |  |  |  |
HCAP Acquisition | Common Stock |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Common stock, issued |  | 15,252,453 |  |  |  |  |  |  |
Common stock, par value |  | $ 0.01 |  |  |  |  |  |  |
[1] | As of June 30, 2022, the Total Amount Outstanding Exclusive of Treasury Securities consisted of 4.875% Notes due 2026 of $108,000, Revolving Credit Facilities of $93,071 and 2018-2 Secured Notes of $163,863.
[2] | Total amount of each class of senior securities outstanding at the end of the period presented.
[3] | As of March 31, 2022, the Total Amount Outstanding Exclusive of Treasury Securities consisted of 4.875% Notes due 2026 of $108,000, Revolving Credit Facilities of $80,571 and 2018-2 Secured Notes of $163,863.

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