v3.25.1
Document And Entity Information - shares
 3 Months Ended
Mar. 31, 2025
Apr. 30, 2025
Document And Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 001-36860  
Entity Registrant Name IOVANCE BIOTHERAPEUTICS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 75-3254381  
Entity Address, Address Line One 825 Industrial Road, Suite 100  
Entity Address, City or Town San Carlos  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94070  
City Area Code 650  
Local Phone Number 260-7120  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Title of 12(b) Security Common Stock, par value $0.000041666  
Trading Symbol IOVA  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   333,934,387
Entity Central Index Key 0001425205  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false