Cover - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Mar. 10, 2026 |
Jun. 30, 2025 |
|
| Document Type | 10-K | |||
| Amendment Flag | false | |||
| Document Annual Report | true | |||
| Document Transition Report | false | |||
| Document Period End Date | Dec. 31, 2025 | |||
| Document Fiscal Period Focus | FY | |||
| Document Fiscal Year Focus | 2025 | |||
| Current Fiscal Year End Date | --12-31 | |||
| Entity File Number | 814-00852 | |||
| Entity Registrant Name | SuRo Capital Corp. | |||
| Entity Central Index Key | 0001509470 | |||
| Entity Tax Identification Number | 27-4443543 | |||
| Entity Incorporation, State or Country Code | MD | |||
| Entity Address, Address Line One | 640 Fifth Avenue | |||
| Entity Address, Address Line Two | 12th Floor | |||
| Entity Address, City or Town | New York | |||
| Entity Address, State or Province | NY | |||
| Entity Address, Postal Zip Code | 10019 | |||
| City Area Code | (212) | |||
| Local Phone Number | 931-6331 | |||
| Entity Well-known Seasoned Issuer | No | |||
| Entity Voluntary Filers | No | |||
| Entity Current Reporting Status | Yes | |||
| Entity Interactive Data Current | Yes | |||
| Entity Filer Category | Non-accelerated Filer | |||
| Entity Small Business | false | |||
| Entity Emerging Growth Company | false | |||
| Entity Shell Company | false | |||
| Entity Public Float | $ 179,919,391 | |||
| Entity Common Stock, Shares Outstanding | 25,387,756 | |||
| Documents Incorporated by Reference [Text Block] | Portions of the Registrant’s definitive proxy statement relating to the Registrant’s 2026 annual meeting of stockholders (the “2026 Proxy Statement”), to be filed with the Securities and Exchange Commission (the “SEC”) within 120 days following the end of the Registrant’s fiscal year, are incorporated by reference in Part III of this annual report on Form 10-K as indicated herein. | |||
| ICFR Auditor Attestation Flag | false | |||
| Document Financial Statement Error Correction [Flag] | false | |||
| Entity Listing, Par Value Per Share | $ 0.01 | |||
| Auditor Firm ID | 199 | 688 | ||
| Auditor Opinion [Text Block] | We have audited the accompanying consolidated statements of assets and liabilities of SuRo Capital Corp. and Subsidiaries (the “Company”) including the consolidated schedule of investments as of December 31, 2025, the related consolidated statements of operations, cash flows, and changes in net assets for the year ended December 31, 2025, the financial highlights (presented in Note 8) for the year then ended, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements and financial highlights present fairly, in all material respects, the financial position of the Company as of December 31, 2025, and the results of its operations and its cash flows for the year ended December 31, 2025 and the financial highlights for the year then ended in conformity with accounting principles generally accepted in the United States of America. | |||
| Auditor Name | CBIZ CPAs P.C | Marcum LLP | ||
| Auditor Location | Boston, MA | Boston, MA | ||
| Common Stock, par value $0.01 per share | ||||
| Title of 12(b) Security | Common Stock, par value $0.01 per share | |||
| Trading Symbol | SSSS | |||
| Security Exchange Name | NASDAQ | |||
| 6.00% Notes due 2026 | ||||
| Title of 12(b) Security | 6.00% Notes due 2026 | |||
| Trading Symbol | SSSSL | |||
| Security Exchange Name | NASDAQ | |||