| Cover | May 24, 2023 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 24, 2023 |
| Entity File Number | 814-00638 |
| Entity Registrant Name | OXFORD SQUARE CAPITAL CORP. |
| Entity Central Index Key | 0001259429 |
| Entity Tax Identification Number | 20-0188736 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 8 Sound Shore Drive |
| Entity Address, Address Line Two | Suite 255 |
| Entity Address, City or Town | Greenwich |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06830 |
| City Area Code | 203 |
| Local Phone Number | 983-5275 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common stock, par value $0.01 per share | |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | OXSQ |
| Security Exchange Name | NASDAQ |
| 6.50% Notes due 2024 | |
| Title of 12(b) Security | 6.50% Notes due 2024 |
| Trading Symbol | OXSQL |
| Security Exchange Name | NASDAQ |
| 6.25% Notes due 2026 | |
| Title of 12(b) Security | 6.25% Notes due 2026 |
| Trading Symbol | OXSQZ |
| Security Exchange Name | NASDAQ |
| 5.50% Notes due 2028 | |
| Title of 12(b) Security | 5.50% Notes due 2028 |
| Trading Symbol | OXSQG |
| Security Exchange Name | NASDAQ |
| Right to purchase Common stock, par value $0.01 per share | |
| Title of 12(b) Security | Right to purchase Common stock, par value $0.01 per share |
| Trading Symbol | OXSQR |
| Security Exchange Name | NASDAQ |
