| Document And Entity Information | Jul. 28, 2022 |
| Document Information [Line Items] | |
| Entity, Registrant Name | NEXPOINT REAL ESTATE FINANCE, INC. |
| Document, Type | 8-K |
| Document, Period End Date | Jul. 28, 2022 |
| Entity, Incorporation, State or Country Code | MD |
| Entity, File Number | 001-39210 |
| Entity, Tax Identification Number | 84-2178264 |
| Entity, Address, Address Line One | 300 Crescent Court, Suite 700 |
| Entity, Address, City or Town | Dallas |
| Entity, Address, State or Province | TX |
| Entity, Address, Postal Zip Code | 75201 |
| City Area Code | 214 |
| Local Phone Number | 276-6300 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | true |
| Entity, Ex Transition Period | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001786248 |
| CommonStock Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | NREF |
| Security Exchange Name | NYSE |
| SeriesACumulativeRedeemablePreferredStock850 Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 8.50% Series A Cumulative Redeemable Preferred Stock |
| Trading Symbol | NREF-PRA |
| Security Exchange Name | NYSE |
