Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.1.9
Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], Resunab [Member], USD $)
0 Months Ended
Apr. 20, 2015
Installment
Apr. 20, 2015
Subsequent Event [Line Items]    
Amount entitled to receive upon execution of award agreement $ 1,250,000us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized  
Percentage of royalty over receivables under agreement 500.00%crbp_PercentageOfRoyaltyOverReceivablesUnderAgreement 500.00%crbp_PercentageOfRoyaltyOverReceivablesUnderAgreement
Number of installments 3crbp_NumberOfInstallments  
Payment due period after the first commercial sale 0crbp_PaymentDuePeriodAfterTheFirstCommercialSale 0crbp_PaymentDuePeriodAfterTheFirstCommercialSale
Royalty payment, sales target 500,000,000crbp_RoyaltyPaymentSalesTarget 500,000,000crbp_RoyaltyPaymentSalesTarget
Maximum [Member]
   
Subsequent Event [Line Items]    
Development award received 5,000,000us-gaap_GainContingencyUnrecordedAmount
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= crbp_ResunabMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
5,000,000us-gaap_GainContingencyUnrecordedAmount
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= crbp_ResunabMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Upon Commercialization Of The Product [Member] | Maximum [Member]
   
Subsequent Event [Line Items]    
Royalty payable 25,000,000us-gaap_RoyaltyExpense
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= crbp_ResunabMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= crbp_UponCommercializationOfTheProductMember
 
Upon Reaching The Sales Target [Member] | Maximum [Member]
   
Subsequent Event [Line Items]    
Royalty payable 5,000,000us-gaap_RoyaltyExpense
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= crbp_ResunabMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= crbp_UponReachingTheSalesTargetMember
 
Upon Transfer Sale Or Licensing [Member]
   
Subsequent Event [Line Items]    
Royalty payable $ 15,000,000us-gaap_RoyaltyExpense
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= crbp_ResunabMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= crbp_UponTransferSaleOrLicensingMember