Annual report [Section 13 and 15(d), not S-K Item 405]

Cover

v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 23, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-41455    
Entity Registrant Name MAIA BIOTECHNOLOGY, INC.    
Entity Central Index Key 0001878313    
Entity Tax Identification Number 83-1495913    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 444 West Lake Street    
Entity Address, Address Line Two Suite 1700    
Entity Address, City or Town Chicago    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60606    
City Area Code (312)    
Local Phone Number 416-8592    
Title of 12(b) Security Common Stock, $0.0001 par value per share    
Trading Symbol MAIA    
Security Exchange Name NYSEAMER    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 48,948,795
Entity Common Stock, Shares Outstanding   60,671,491  
Documents Incorporated by Reference [Text Block] Portions of the registrant’s definitive proxy statement for the annual stockholder meeting to be held in 2026 are incorporated by reference into Part III of this Annual Report on Form 10-K as noted herein. The registrant intends to file its proxy statement within 120 days after its fiscal year end.    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 248    
Auditor Name GRANT THORNTON LLP    
Auditor Location Charlotte, North Carolina