Annual report pursuant to Section 13 and 15(d)

Warrants - Additional Information (Detail)

v2.4.1.9
Warrants - Additional Information (Detail) (USD $)
1 Months Ended 6 Months Ended 12 Months Ended
Aug. 31, 2014
Jun. 30, 2013
Oct. 31, 2009
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Class of Warrant or Right [Line Items]            
Warrant exercisable term 5 years   5 years      
Number of shares of common stock called by warrants 162,539us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 27,839us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights   33,333us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Warrants, exercise price per share $ 1.00invest_InvestmentWarrantsExercisePrice $ 0.66invest_InvestmentWarrantsExercisePrice $ 0.60invest_InvestmentWarrantsExercisePrice      
Changes in fair value of derivative warrant liability       $ 28,448us-gaap_FairValueAdjustmentOfWarrants $ 28,448us-gaap_FairValueAdjustmentOfWarrants $ (1,978)us-gaap_FairValueAdjustmentOfWarrants
Estimated fair value of warrants 55,000crbp_FairValueOfWarrantIssued          
Additional warrants issued   48,222crbp_AdditionalSharesWarrantsIssuedDueToAntiDilutionProvision        
2014 Private Placement [Member]            
Class of Warrant or Right [Line Items]            
Warrant exercisable term         5 years  
Number of shares of common stock called by warrants         10,260,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
 
Placement Agent Member | 2014 Private Placement [Member]            
Class of Warrant or Right [Line Items]            
Warrant exercisable term         5 years  
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
 
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]            
Warrant exercisable term         5 years  
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
 
Warrants, exercise price per share         $ 1.00invest_InvestmentWarrantsExercisePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crbp_InvestorsAndFormerStockHoldersMember
/ us-gaap_StatementClassOfStockAxis
= crbp_SeriesAConvertiblePreferredStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
 
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