Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2020
Nov. 04, 2020
Document Type 10-Q  
Document Period End Date Sep. 30, 2020  
Entity Registrant Name Cellectar Biosciences, Inc.  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   26,813,593
Entity Central Index Key 0001279704  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Common Stock [Member]    
Trading Symbol CLRB  
Title of 12(b) Security Common stock, par value $0.00001  
Security Exchange Name NASDAQ  
Warrant [Member]    
Trading Symbol CLRBZ  
Title of 12(b) Security Warrant to purchase common stock, expiring April 20, 2021  
Security Exchange Name NASDAQ