v3.26.1
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 14, 2026
Document Information [Line Items]    
Entity Central Index Key 0001860657  
Entity Registrant Name Allarity Therapeutics, Inc.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-41160  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 87-2147982  
Entity Address, Address Line One 123 E Tarpon Ave  
Entity Address, City or Town Tarpon Springs  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 34689  
City Area Code 401  
Local Phone Number 426-4664  
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol ALLR  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   15,910,724