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FAIR VALUE (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Liabilities: |  |
Warrants | $ 5,176,915 us-gaap_DerivativeLiabilitiesCurrent | $ 3,359,363 us-gaap_DerivativeLiabilitiesCurrent
February 2013 Public Offering Warrants [Member] |  |
Liabilities: |  |
Warrants | 1,127,500 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_SubsidiarySaleOfStockAxis = clrb_February2013PublicOfferingWarrantsMember | 3,355,000 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_SubsidiarySaleOfStockAxis = clrb_February2013PublicOfferingWarrantsMember
August 2014 Warrants [Member] |  |
Liabilities: |  |
Warrants | 4,048,416 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_SubsidiarySaleOfStockAxis = clrb_August2014WarrantsMember |
Legacy Warrants [Member] |  |
Liabilities: |  |
Warrants | 999 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_StatementEquityComponentsAxis = clrb_WarrantOneMember | 4,363 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_StatementEquityComponentsAxis = clrb_WarrantOneMember
Fair Value, Inputs, Level 1 [Member] |  |
Liabilities: |  |
Warrants | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 1 [Member] | February 2013 Public Offering Warrants [Member] |  |
Liabilities: |  |
Warrants | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_February2013PublicOfferingWarrantsMember | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_February2013PublicOfferingWarrantsMember
Fair Value, Inputs, Level 1 [Member] | August 2014 Warrants [Member] |  |
Liabilities: |  |
Warrants | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_August2014WarrantsMember |
Fair Value, Inputs, Level 1 [Member] | Legacy Warrants [Member] |  |
Liabilities: |  |
Warrants | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementEquityComponentsAxis = clrb_WarrantOneMember | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementEquityComponentsAxis = clrb_WarrantOneMember
Fair Value, Inputs, Level 2 [Member] |  |
Liabilities: |  |
Warrants | 4,049,415 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 4,363 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 2 [Member] | February 2013 Public Offering Warrants [Member] |  |
Liabilities: |  |
Warrants | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_February2013PublicOfferingWarrantsMember | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_February2013PublicOfferingWarrantsMember
Fair Value, Inputs, Level 2 [Member] | August 2014 Warrants [Member] |  |
Liabilities: |  |
Warrants | 4,048,416 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_August2014WarrantsMember |
Fair Value, Inputs, Level 2 [Member] | Legacy Warrants [Member] |  |
Liabilities: |  |
Warrants | 999 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementEquityComponentsAxis = clrb_WarrantOneMember | 4,363 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementEquityComponentsAxis = clrb_WarrantOneMember
Fair Value, Inputs, Level 3 [Member] |  |
Liabilities: |  |
Warrants | 1,127,500 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 3,355,000 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 [Member] | February 2013 Public Offering Warrants [Member] |  |
Liabilities: |  |
Warrants | 1,127,500 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_February2013PublicOfferingWarrantsMember | 3,355,000 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_February2013PublicOfferingWarrantsMember
Fair Value, Inputs, Level 3 [Member] | August 2014 Warrants [Member] |  |
Liabilities: |  |
Warrants | 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_SubsidiarySaleOfStockAxis = clrb_August2014WarrantsMember |
Fair Value, Inputs, Level 3 [Member] | Legacy Warrants [Member] |  |
Liabilities: |  |
Warrants | $ 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementEquityComponentsAxis = clrb_WarrantOneMember | $ 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementEquityComponentsAxis = clrb_WarrantOneMember

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 + Details
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