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           INCOME TAXES (Details 2) 
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        12 Months Ended | |
|---|---|---|
| 
           Dec. 31, 2014 
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           Dec. 31, 2013 
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| Effective Income Tax Rate Reconciliation [Line Items] | ||
| Income tax benefit using U.S. federal statutory rate | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 
| State income taxes | (6.60%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | (0.82%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 
| Permanent items | 9.33%clrb_EffectiveIncomeTaxRateReconciliationPermanentAdjustment | 5.10%clrb_EffectiveIncomeTaxRateReconciliationPermanentAdjustment | 
| Change in valuation allowance | (37.72%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | (42.40%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 
| Other | 0.99%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 4.12%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 
| Total | 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 
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- Definition 
          Represents effective income tax rate reconciliation permanent adjustment during the reporting period. No definition available. 
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- Definition 
          Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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