| Document And Entity Information | Nov. 14, 2024 |
| Document Information [Line Items] | |
| Entity, Registrant Name | ALLARITY THERAPEUTICS, INC. |
| Document, Type | 8-K |
| Document, Period End Date | Nov. 14, 2024 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-41160 |
| Entity, Tax Identification Number | 87-2147982 |
| Entity, Address, Address Line One | 24 School Street |
| Entity, Address, Address Line Two | 2nd Floor |
| Entity, Address, City or Town | Boston |
| Entity, Address, State or Province | MA |
| Entity, Address, Postal Zip Code | 02108 |
| City Area Code | 401 |
| Local Phone Number | 426-4664 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | ALLR |
| Security Exchange Name | NASDAQ |
| Entity, Emerging Growth Company | true |
| Entity, Ex Transition Period | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001860657 |
