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Organization - Additional Information (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 11, 2014 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Aug. 31, 2023 | Jun. 30, 2022 | Aug. 30, 2021
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Issuance of common shares |  | 0 | 0 | 0 | 0 |  |  |  |
Common stock, par value |  | $ 0.001 |  | $ 0.001 |  | $ 0.001 |  |  |
Common stock, shares issued |  | 14,431,202 |  | 14,431,202 |  | 14,406,244 |  |  |
Issuance of common shares |  |  |  | $ 0 | $ 0 |  |  |  |
Common stock, shares outstanding |  | 14,431,202 | 14,403,752 | 14,431,202 | 14,403,752 | 14,406,244 |  |  |
Repayment of debt percentage |  |  |  | 100.00% |  |  |  |  |
Qualifying assets percentage |  |  |  | 70.00% |  |  |  |  |
Amount of market capitalization |  |  |  | $ 250,000,000 |  |  |  |  |
Taxable subsidiaries |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Ownership Interest In Adviser |  |  |  |  |  |  | 7.00% |  |
CM Finance LLC |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock, shares issued |  | 6,000,000 |  | 6,000,000 |  |  |  |  |
Issuance of debt |  |  |  | $ 39,800,000 |  |  |  |  |
Stifel Venture Corp |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock, shares issued |  |  |  |  |  |  |  | 2,181,818 |
Issuance of common shares |  |  |  | $ 32,700,000 |  |  |  |  |
Number of common stock shares repurchased |  |  |  | 2,181,818 |  |  |  |  |
Common stock, shares outstanding |  | 13,666,666 |  | 13,666,666 |  |  |  |  |
Investcorp Credit Management |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock, par value |  |  |  |  |  |  |  |  | $ 0.001
Common stock, shares issued |  |  |  |  |  |  |  |  | 680,985
Common stock, shares outstanding |  |  |  |  |  |  |  |  | 680,985
IPO | Investcorp Credit Management | Common Stock |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Issuance of common shares | 7,666,666 |  |  |  |  |  |  |  |
Common stock, par value | $ 0.001 |  |  |  |  |  |  |  |
Shares offering, price per share | $ 15 |  |  |  |  |  |  |  |
Proceeds from initial public offering | $ 111,500,000 |  |  |  |  |  |  |  |

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