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Document and Entity Information (USD $)
 12 Months Ended
Dec. 31, 2013
Mar. 24, 2014
Jun. 30, 2013
Document and Entity Information [Abstarct]      
Entity Registrant Name Cyclacel Pharmaceuticals, Inc.    
Entity Central Index Key 0001130166    
Trading Symbol cycc    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Current Fiscal Year End Date --12-31    
Entity Filer Category Smaller Reporting Company    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding   19,819,332  
Entity Public Float     $ 51,061,987
Document Type 10-K    
Document Period End Date Dec. 31, 2013    
Amendment Flag false    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus FY