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STOCK-BASED COMPENSATION (Details Textual) (USD $)
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1 Months Ended |
9 Months Ended |
1 Months Ended |
12 Months Ended |
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Feb. 20, 2014
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Sep. 30, 2014
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Oct. 31, 2013
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Dec. 31, 2013
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Feb. 05, 2014
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
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81,805us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
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| Share Based Compensation Arrangement By Share Based Payment Award, Options, Exercisable, Weighted Average Exercise Price |
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$ 27.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
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| Employee Service Share Based Compensation Nonvested Total Compensation In Current Year |
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$ 1,094,000clrb_EmployeeServiceShareBasedCompensationNonvestedTotalCompensationInCurrentYear
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| Employee Service Share Based Compensation Nonvested Total Compensation In Year Two |
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562,000clrb_EmployeeServiceShareBasedCompensationNonvestedTotalCompensationInYearTwo
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| Employee Service Share Based Compensation Nonvested Total Compensation In Year Three |
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193,000clrb_EmployeeServiceShareBasedCompensationNonvestedTotalCompensationInYearThree
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| Weighted-Average Grant-Date Fair Value Of Vested Options Outstanding (in dollars per share) |
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$ 16.23clrb_WeightedAverageGrantDateFairValueOfVestedOptionsOutstanding
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| Weighted Average Grant Date Fair Value Of Unvested Options Outstanding (in dollars per share) |
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$ 5.90clrb_WeightedAverageGrantDateFairValueOfUnvestedOptionsOutstanding
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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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259,310clrb_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsUnvestedAndExpectedToVestOutstandingNumber
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| Estimated Stock Based Compensation Expense Up On Vesting Of Options |
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418,000clrb_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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$ 20.00us-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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$ 1,849,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
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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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| 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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