v3.26.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2026
Oct. 27, 2026
Document And Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
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 300 Rouse Blvd  
Entity Address, City or Town Philadelphia  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19112  
City Area Code 650  
Local Phone Number 260-7120  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category 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   462,655,151
Entity Central Index Key 0001425205  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q3  
Amendment Flag false