Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
12 Months Ended
Dec. 31, 2023
Mar. 21, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K/A    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2023    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2022    
Current Fiscal Year End Date --12-31    
Entity File Number 001-36598    
Entity Registrant Name CELLECTAR BIOSCIENCES, INC.    
Entity Central Index Key 0001279704    
Entity Tax Identification Number 04-3321805    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 100 Campus Drive    
Entity Address, City or Town Florham Park    
Entity Address, State or Province NJ    
Entity Address, Postal Zip Code 07932    
City Area Code 608    
Local Phone Number 441-8120    
Title of 12(b) Security Common Stock, par value $0.00001    
Trading Symbol CLRB    
Security Exchange Name NASDAQ    
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 false    
Entity Shell Company false    
Entity Public Float     $ 18,922,339
Entity Common Stock, Shares Outstanding   32,260,510  
ICFR Auditor Attestation Flag false    
Auditor Name Baker Tilly US, LLP    
Auditor Location Philadelphia, PA    
Auditor Firm ID 23