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STOCK-BASED COMPENSATION (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] |  |
Total stock-based compensation | $ 850,350 us-gaap_ShareBasedCompensation | $ 2,323,233 us-gaap_ShareBasedCompensation
Employee and Director Stock Option Grants [Member] |  |
Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] |  |
Total stock-based compensation | 844,082 us-gaap_ShareBasedCompensation / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_EmployeeAndDirectorStockOptionMember | 2,290,147 us-gaap_ShareBasedCompensation / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_EmployeeAndDirectorStockOptionMember
Employee and Director Stock Option Grants [Member] | Research and Development [Member] |  |
Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] |  |
Total stock-based compensation | 174,666 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_EmployeeAndDirectorStockOptionMember | 355,012 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_EmployeeAndDirectorStockOptionMember
Employee and Director Stock Option Grants [Member] | General and Administrative [Member] |  |
Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] |  |
Total stock-based compensation | 621,563 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_EmployeeAndDirectorStockOptionMember | 1,229,617 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_EmployeeAndDirectorStockOptionMember
Employee and Director Stock Option Grants [Member] | Restructuring Costs [Member] |  |
Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] |  |
Total stock-based compensation | 47,853 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = clrb_RestructuringCostsMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_EmployeeAndDirectorStockOptionMember | 705,518 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = clrb_RestructuringCostsMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_EmployeeAndDirectorStockOptionMember
Non Employee Consultant Stock Option Grants [Member] |  |
Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] |  |
Total stock-based compensation | 6,268 us-gaap_ShareBasedCompensation / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_NonEmployeeConsultantStockOptionMember | 33,086 us-gaap_ShareBasedCompensation / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_NonEmployeeConsultantStockOptionMember
Non Employee Consultant Stock Option Grants [Member] | Research and Development [Member] |  |
Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] |  |
Total stock-based compensation | 6,268 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_NonEmployeeConsultantStockOptionMember | 21,516 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_NonEmployeeConsultantStockOptionMember
Non Employee Consultant Stock Option Grants [Member] | General and Administrative [Member] |  |
Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] |  |
Total stock-based compensation | $ 0 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_NonEmployeeConsultantStockOptionMember | $ 11,570 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = clrb_NonEmployeeConsultantStockOptionMember

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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