Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE (Details Textual)

v2.4.1.9
FAIR VALUE (Details Textual)
 9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Aug. 20, 2014
Feb. 20, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair Value Assumptions, Risk Free Interest Rate 1.07%us-gaap_FairValueAssumptionsRiskFreeInterestRate 0.92%us-gaap_FairValueAssumptionsRiskFreeInterestRate    
Fair Value Assumptions, Expected Volatility Rate 110.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate 109.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate    
Fair Value Assumptions, Expected Term 3 years 7 months 20 days 4 years 1 month 20 days    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 6,604,096us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights     275,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Warrants Settleable In Cash, Cash Settlement Feature     4,943,023clrb_WarrantsSettleableInCashCashSettlementFeature  
Fair Value, Inputs, Level 3 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 550,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member 		     
February 2013 Public Offering Warrants [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 825,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_February2013PublicOfferingWarrantsMember 		     
Maximum [Member] | February 2013 Public Offering Warrants [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair Value Assumptions, Risk Free Interest Rate   1.27%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_February2013PublicOfferingWarrantsMember 		   
Fair Value Assumptions, Expected Volatility Rate   115.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_February2013PublicOfferingWarrantsMember 		   
Fair Value Assumptions, Expected Term   4 years 1 month 20 days    
Minimum [Member] | February 2013 Public Offering Warrants [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair Value Assumptions, Risk Free Interest Rate   0.07%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_February2013PublicOfferingWarrantsMember 		   
Fair Value Assumptions, Expected Volatility Rate   75.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_February2013PublicOfferingWarrantsMember 		   
Fair Value Assumptions, Expected Term   1 month 20 days    
Legacy Warrants        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 1,365us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_StatementEquityComponentsAxis
= clrb_WarrantOneMember 		[1]      
Legacy Warrants | Fair Value, Inputs, Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 1,365us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_StatementEquityComponentsAxis
= clrb_WarrantOneMember 		     
[1] These warrants have a certain type of cash settlement feature or their exercise prices or the number of shares for which the warrant may be exercised are subject to adjustment for “down-rounds” and the warrants have been accounted for as derivative instruments as described in Note 3, with the exception of 96,988 warrants issued in August 2014.