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STOCK-BASED COMPENSATION (Details Textual) (USD $)
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1 Months Ended |
12 Months Ended |
1 Months Ended |
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Feb. 20, 2014
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Nov. 30, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Oct. 31, 2013
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
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81,805us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
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| Share Based Compensation Arrangement By Share Based Payment Award, Options, Exercisable, Weighted Average Exercise Price |
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$ 24.53us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
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| Employee Service Share Based Compensation Nonvested Total Compensation In Current Year |
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$ 615,754clrb_EmployeeServiceShareBasedCompensationNonvestedTotalCompensationInCurrentYear
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| Employee Service Share Based Compensation Nonvested Total Compensation In Year Two |
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455,975clrb_EmployeeServiceShareBasedCompensationNonvestedTotalCompensationInYearTwo
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| Employee Service Share Based Compensation Nonvested Total Compensation In Year Three |
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265,240clrb_EmployeeServiceShareBasedCompensationNonvestedTotalCompensationInYearThree
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| Weighted-Average Grant-Date Fair Value Of Vested Options Outstanding (in dollars per share) |
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$ 14.55us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
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$ 17.60us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
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| Weighted Average Grant Date Fair Value Of Unvested Options Outstanding (in dollars per share) |
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$ 4.67us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
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$ 6.60us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
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| Share Based Compensation Arrangement By Share Based Payment Award Options Unvested and Expected To Vest Outstanding Number (in shares) |
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253,754clrb_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsUnvestedAndExpectedToVestOutstandingNumber
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| Estimated Stock Based Compensation Expense Up On Vesting Of Options |
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418,024clrb_EstimatedStockBasedCompensationExpenseUpOnVestingOfOptions
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| Anti-Dilution Option Reduced By Expiration Of Warrants |
14,474clrb_AntidilutionOptionReducedByExpirationOfWarrants
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| Class of Warrant or Right, Exercise Price of Warrants or Rights |
$ 10.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights |
275,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
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6,604,096us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
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| Anti-Dilution Option Reduced Rate |
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19clrb_AntidilutionOptionReducedRate
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| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |
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1,754,993us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
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| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |
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112,657us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
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| Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost |
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171,835us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost
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136,022us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost
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| Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost |
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101,972us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
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47,853us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
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569,496us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
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| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |
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$ 3.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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$ 5.60us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value |
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$ 936,310us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
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$ 2,109,200us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
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| Performance Based [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
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264,278us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= clrb_PerformanceBasedMember
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| Stock Incentive Plan 2006 [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common Stock, Capital Shares Reserved for Future Issuance |
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700,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= clrb_StockIncentivePlan2006Member
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| Employee [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures Rate |
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2.00%clrb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresRate
/ us-gaap_TitleOfIndividualAxis
= clrb_EmployeeMember
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| Chief Executive Officer [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
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96,278us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
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| Share Based Compensation Arrangement By Share Based Payment Award, Options, Exercisable, Weighted Average Exercise Price |
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15.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
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| Director [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures Rate |
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0.00%clrb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresRate
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
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