Quarterly report pursuant to Section 13 or 15(d)

Warrants - Additional Information (Detail)

v2.4.1.9
Warrants - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended
Aug. 31, 2014
Jun. 30, 2013
Oct. 31, 2009
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Class of Warrant or Right [Line Items]            
Number of shares of common stock called by warrants 162,539us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 27,839us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 13,647,848us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights   301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Weighted average exercise price of warrants       $ 0.99crbp_WarrantsWeightedAverageExercisePrice    
Weighted average remaining life of warrants       4 years 3 months 18 days    
Number of shares purchased for warrants exercised       62,129crbp_WarrantsExercisedToPurchaseCommonStockShares    
Warrant exercisable term 5 years   5 years      
Warrants, exercise price per share $ 1invest_InvestmentWarrantsExercisePrice $ 0.66invest_InvestmentWarrantsExercisePrice $ 0.60invest_InvestmentWarrantsExercisePrice      
Changes in fair value of derivative warrant liability         $ (1,518)us-gaap_FairValueAdjustmentOfWarrants  
Additional warrants issued   48,222crbp_AdditionalSharesWarrantsIssuedDueToAntiDilutionProvision        
Placement Agent Member | 2014 Private Placement [Member]            
Class of Warrant or Right [Line Items]            
Number of shares of common stock called by warrants       2,047,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crbp_PlacementAgentMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Warrant exercisable term       5 years    
Warrants, exercise price per share       $ 1.00invest_InvestmentWarrantsExercisePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crbp_PlacementAgentMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Debt instrument redemption description       These warrants have a provision that permits the Company to call and redeem the warrants after a thirty day notice period if the stock trades at $2.50 or greater on a volume weighted average basis for at least twenty consecutive trading days    
Series A Convertible Preferred Stock [Member] | Investors And Former Holders Of Series A Convertible Preferred Stock [Member] | 2014 Private Placement [Member]            
Class of Warrant or Right [Line Items]            
Number of shares of common stock called by warrants       11,177,612us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crbp_InvestorsAndFormerStockHoldersMember
/ us-gaap_StatementClassOfStockAxis
= crbp_SeriesAConvertiblePreferredStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Warrant exercisable term       5 years    
Warrants, exercise price per share       $ 1.00invest_InvestmentWarrantsExercisePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crbp_InvestorsAndFormerStockHoldersMember
/ us-gaap_StatementClassOfStockAxis
= crbp_SeriesAConvertiblePreferredStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Notice period provision to call and redeem warrants       30 days    
Minimum trading price of warrants       $ 2.50crbp_MinimumTradingPriceOfWarrants
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crbp_InvestorsAndFormerStockHoldersMember
/ us-gaap_StatementClassOfStockAxis
= crbp_SeriesAConvertiblePreferredStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Threshold trading period to call and redeem warrants       20 years    
Interest Expense [Member]            
Class of Warrant or Right [Line Items]            
Changes in fair value of derivative warrant liability     1,005us-gaap_FairValueAdjustmentOfWarrants
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
     
General and Administrative Expense [Member]            
Class of Warrant or Right [Line Items]            
Estimated fair value of warrants   $ 21,910crbp_FairValueOfWarrantIssued
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember