v3.25.2
Cover Page
6 Months Ended
Jun. 30, 2025
Cover [Abstract]  
Document Type 6-K
Document Period End Date Jun. 30, 2025
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2025
Entity Registrant Name I-MAB
Entity File Number 001-39173
Entity Address, Address Line One 2440 Research Boulevard, Suite 400
Entity Address, City or Town Rockville
Entity Address, State or Province MD
Entity Address, Postal Zip Code 20850
Entity Central Index Key 0001778016
Document Fiscal Period Focus Q2
Amendment Flag false