Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY (Details Textual)

v2.4.1.9
STOCKHOLDERS' EQUITY (Details Textual) (USD $)
1 Months Ended 0 Months Ended 12 Months Ended 1 Months Ended
Aug. 20, 2014
Jun. 13, 2014
May 22, 2014
Dec. 31, 2014
Dec. 31, 2013
Feb. 28, 2013
Jun. 06, 2014
Feb. 20, 2014
Feb. 20, 2013
Aug. 14, 2014
Class of Warrant or Right [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       6,604,096us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights       275,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights    
Class of Warrant or Right, Exercise Price of Warrants or Rights               $ 10.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1    
Proceeds from Issuance or Sale of Equity $ 13,475,832us-gaap_ProceedsFromIssuanceOrSaleOfEquity                  
Proceeds from (Repurchase of) Equity 11,877,143us-gaap_ProceedsFromRepurchaseOfEquity                  
Payments of Stock Issuance Costs 1,598,689us-gaap_PaymentsOfStockIssuanceCosts     518,822us-gaap_PaymentsOfStockIssuanceCosts 0us-gaap_PaymentsOfStockIssuanceCosts          
Resale Of Shares Of Common Stock       200,000clrb_ResaleOfSharesOfCommonStock            
Common Stock, Shares, Issued       7,562,762us-gaap_CommonStockSharesIssued 2,869,739us-gaap_CommonStockSharesIssued          
Warrants Issued To Purchase Common Stock         275,000clrb_WarrantsIssuedToPurchaseCommonStock          
Fair Value Of Warrants Classified As Derivative Liability Outstanding         5,720,000clrb_FairValueOfWarrantsClassifiedAsDerivativeLiabilityOutstanding          
Loss on issuance of derivative warrants       0us-gaap_DerivativeGainLossOnDerivativeNet 744,957us-gaap_DerivativeGainLossOnDerivativeNet          
Change In Unrealized Gain Loss On Fair Value         2,365,000clrb_ChangeInUnrealizedGainLossOnFairValue          
Class of Warrant or Right, Outstanding       550,000us-gaap_ClassOfWarrantOrRightOutstanding            
Unrealized Gain (Loss) on Derivatives       2,227,500us-gaap_UnrealizedGainLossOnDerivatives            
Common Stock, Shares Authorized   20,000,000us-gaap_CommonStockSharesAuthorized   20,000,000us-gaap_CommonStockSharesAuthorized 20,000,000us-gaap_CommonStockSharesAuthorized   150,000,000us-gaap_CommonStockSharesAuthorized      
Stockholders' Equity, Reverse Stock Split   1-for-20 reverse split At the annual meeting of stockholders held on May 22, 2014, the Company’s stockholders approved an amendment to the certificate of incorporation to effect a reverse split of the Company’s common stock at a ratio between 1:10 to 1:20 in order to satisfy requirements for the listing of the Company’s common stock on the NASDAQ Capital Market. In addition, the proposal approved by the stockholders provided that if the reverse split was effected, the number of shares of common stock that the Company is authorized to issue would be reduced from 150,000,000 to the greater of (A) 20,000,000 and (B) the number of shares equal to three (3) times the sum of the number of all shares of common stock outstanding and the number of shares of common stock issuable upon exercise or conversion of all outstanding options, warrants and convertible debt.              
February Offering One [Member]                    
Class of Warrant or Right [Line Items]                    
Common Stock, Shares, Issued                 550,000us-gaap_CommonStockSharesIssued
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingOneMember
 
Warrants Issued To Purchase Common Stock                 550,000clrb_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingOneMember
 
Warrants Exercise Price                 $ 10.00clrb_WarrantsExercisePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingOneMember
 
Gross Proceeds From Issuance Of Common Stock Warrants           5,500,000clrb_GrossProceedsFromIssuanceOfCommonStockWarrants
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingOneMember
       
Proceeds From Issuance Of Common Stock Warrants Net           4,975,153clrb_ProceedsFromIssuanceOfCommonStockWarrantsNet
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingOneMember
       
February Offering Two [Member]                    
Class of Warrant or Right [Line Items]                    
Warrants Issued To Purchase Common Stock                 275,000clrb_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingTwoMember
 
Warrants Exercise Price                 $ 10.00clrb_WarrantsExercisePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingTwoMember
 
February Offering [Member]                    
Class of Warrant or Right [Line Items]                    
Warrants Issued To Purchase Common Stock         38,500clrb_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingMember
         
Warrants Exercise Price         $ 12.50clrb_WarrantsExercisePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingMember
         
Cash Fee Paid To Placement Agent         385,000clrb_CashFeePaidToPlacementAgent
/ us-gaap_SubsidiarySaleOfStockAxis
= clrb_FebruaryOfferingMember
         
Warrants Expiration Date         Feb. 04, 2018          
Maximum [Member]                    
Class of Warrant or Right [Line Items]                    
Percentage Of Liquidated Damages Per Month       5.00%clrb_PercentageOfLiquidatedDamagesPerMonth
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
           
Minimum [Member]                    
Class of Warrant or Right [Line Items]                    
Percentage Of Liquidated Damages Per Month       1.50%clrb_PercentageOfLiquidatedDamagesPerMonth
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
           
Underwriter [Member]                    
Class of Warrant or Right [Line Items]                    
Warrants Not Settleable in Cash, Fair Value Disclosure 275,000us-gaap_WarrantsNotSettleableInCashFairValueDisclosure
/ us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrantAxis
= clrb_UnderwriterMember
                 
August 2014 Debenture [Member]                    
Class of Warrant or Right [Line Items]                    
Share Price $ 3.76us-gaap_SharePrice
/ us-gaap_DebtInstrumentAxis
= clrb_August2014DebentureMember
                 
Debt Instrument, Face Amount 4,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clrb_August2014DebentureMember
                 
Interest Payable $ 172,435us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= clrb_August2014DebentureMember
                 
August 2014 Underwritten Offering [Member]                    
Class of Warrant or Right [Line Items]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights                   $ 3.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_DebtInstrumentAxis
= clrb_August2014UnderwrittenOfferingMember
Share Price                   $ 3.75us-gaap_SharePrice
/ us-gaap_DebtInstrumentAxis
= clrb_August2014UnderwrittenOfferingMember
Warrant [Member]                    
Class of Warrant or Right [Line Items]                    
Share Price $ 0.01us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
                 
Common Stock [Member]                    
Class of Warrant or Right [Line Items]                    
Stock Issued During Period, Shares, New Issues 3,583,333us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
    3,583,333us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
550,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 3,833,333us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                 
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 4.68us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                 
Share Price $ 3.75us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                 
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date 6.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                 
Common Stock [Member] | Underwriter [Member]                    
Class of Warrant or Right [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 96,988us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrantAxis
= clrb_UnderwriterMember
                 
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 4.6875us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrantAxis
= clrb_UnderwriterMember
                 
Common Stock [Member] | August 2014 Debenture [Member]                    
Class of Warrant or Right [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 1,109,690us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_DebtInstrumentAxis
= clrb_August2014DebentureMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                 
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 4.68us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_DebtInstrumentAxis
= clrb_August2014DebentureMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                 
Debt Conversion, Converted Instrument, Shares Issued 1,109,690us-gaap_DebtConversionConvertedInstrumentSharesIssued1
/ us-gaap_DebtInstrumentAxis
= clrb_August2014DebentureMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember