Document and Entity Information
| Document and Entity Information | Sep. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 30, 2021 |
| Entity File Number | 001-39143 |
| Entity Registrant Name | ALPINE INCOME PROPERTY TRUST, INC. |
| Entity Incorporation, State or Country Code | MD |
| Entity Tax Identification Number | 84-2769895 |
| Entity Address, Address Line One | 1140 N. Williamson Blvd., Suite 140 |
| Entity Address, City or Town | Daytona Beach |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 32114 |
| City Area Code | 386 |
| Local Phone Number | 274-2202 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 Par Value |
| Trading Symbol | PINE |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Entity Central Index Key | 0001786117 |
| Amendment Flag | false |