Annual report pursuant to Section 13 and 15(d)

Fair Value of Assets and Liabilities - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)

v2.4.1.9
Fair Value of Assets and Liabilities - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]      
Derivative warrant liability recorded for warrants issued     $ 19,932us-gaap_DerivativeLiabilitiesCurrent
Change in fair value of the derivative warrant liability 28,448us-gaap_FairValueAdjustmentOfWarrants 28,448us-gaap_FairValueAdjustmentOfWarrants (1,978)us-gaap_FairValueAdjustmentOfWarrants
Derivative warrant liability, Ending balance   0us-gaap_DerivativeFairValueOfDerivativeLiability  
Fair Value, Measurements, Recurring [Member]      
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]      
Derivative warrant liability, Beginning balance 19,932us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
19,932us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Change in fair value of the derivative warrant liability   28,448us-gaap_FairValueAdjustmentOfWarrants
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
(1,978)us-gaap_FairValueAdjustmentOfWarrants
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Reclassification of derivative warrant liability   (48,380)crbp_ReclassificationOfWarrantDerivativeLiability
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Derivative warrant liability, Ending balance     19,932us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value, Measurements, Recurring [Member] | Warrant [Member]      
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]      
Derivative warrant liability recorded for warrants issued     21,910us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]      
Derivative warrant liability, Beginning balance 19,932us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
19,932us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Change in fair value of the derivative warrant liability   28,448us-gaap_FairValueAdjustmentOfWarrants
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
(1,978)us-gaap_FairValueAdjustmentOfWarrants
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Reclassification of derivative warrant liability   (48,380)crbp_ReclassificationOfWarrantDerivativeLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Derivative warrant liability, Ending balance     19,932us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]      
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]      
Derivative warrant liability recorded for warrants issued     $ 21,910us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember