Annual report pursuant to Section 13 and 15(d)

Common Stock - Additional Information (Detail)

v2.4.1.9
Common Stock - Additional Information (Detail) (USD $)
0 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended
Oct. 08, 2014
Aug. 31, 2014
Oct. 31, 2009
Dec. 31, 2014
Apr. 11, 2014
Dec. 31, 2013
Jun. 30, 2013
Common Stock [Line Items]              
Common stock, shares authorized       150,000,000us-gaap_CommonStockSharesAuthorized   150,000,000us-gaap_CommonStockSharesAuthorized  
Common stock, par value       $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare   $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare  
Common stock, shares issued       25,938,332us-gaap_CommonStockSharesIssued   6,964,788us-gaap_CommonStockSharesIssued  
Common stock, shares outstanding       25,938,332us-gaap_CommonStockSharesOutstanding   6,964,788us-gaap_CommonStockSharesOutstanding  
Net Proceeds from common stock       $ 10,305,161us-gaap_ProceedsFromIssuanceOfCommonStock      
Options to purchase shares of common stock       87,691us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised      
Number of common stock called by warrants   162,539us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 27,839us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 33,333us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights   301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Common stock exercised under cashless exercise provision       21,500crbp_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsThroughCashlessExercise      
Reverse stock split Reverse stock split within a range of 1:1.25 to 1:5            
Warrant exercisable term   5 years 5 years        
Net proceeds after deducting offering expense       8,402,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement      
Settlement Agreement [Member]              
Common Stock [Line Items]              
Common stock, shares issued   541,948us-gaap_CommonStockSharesIssued
/ us-gaap_LongtermDebtTypeAxis
= crbp_SettlementAgreementMember
         
Series A Convertible Preferred Stock [Member]              
Common Stock [Line Items]              
Preferred stock, shares converted         1,835,212us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_StatementClassOfStockAxis
= crbp_SeriesAConvertiblePreferredStockMember
   
Series A Non-Convertible Preferred Stock [Member]              
Common Stock [Line Items]              
Preferred stock, shares converted         200,000us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_StatementClassOfStockAxis
= crbp_SeriesANonConvertiblePreferredStockMember
   
Stock Options [Member]              
Common Stock [Line Items]              
Common stock, shares issued       87,691us-gaap_CommonStockSharesIssued
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockOptionMember
     
Net Proceeds from common stock       4,450us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockOptionMember
     
Minimum [Member]              
Common Stock [Line Items]              
Reverse Stock Split Range 0.2us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
           
Maximum [Member]              
Common Stock [Line Items]              
Reverse Stock Split Range 0.8us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
           
Common Stock [Member]              
Common Stock [Line Items]              
Conversion of stock, shares issued         2,035,212us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
   
Options to purchase shares of common stock       87,691us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Aggregate common stock sold, shares       6,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Fair value of stock and warrants       600us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Warrant [Member]              
Common Stock [Line Items]              
Common stock, shares issued       33,333us-gaap_CommonStockSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
     
Net Proceeds from common stock       33,333us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
     
Shares issued under cashless exercise of options       15,360crbp_CommonStockSharesIssuedUnderCashlessExerciseProvision
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
     
2014 Private Placement [Member]              
Common Stock [Line Items]              
Common stock, shares issued         6,000,000us-gaap_CommonStockSharesIssued
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Number of common stock called by warrants       10,260,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
     
Common stock warrants, exercise price       $ 1.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
     
Warrant exercisable term       5 years      
Fair value of stock and warrants       10,260,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
     
2014 Private Placement [Member] | Placement Agent Member              
Common Stock [Line Items]              
Number 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      
Placement agent, cash fee       1,023,000us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crbp_PlacementAgentMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
     
Placement agent, non-accountable expense       308,000us-gaap_ExpenseRelatedToDistributionOrServicingAndUnderwritingFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crbp_PlacementAgentMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
     
2014 Private Placement [Member] | Common Stock [Member]              
Common Stock [Line Items]              
Aggregate common stock sold, shares       10,260,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
     
Fair value of stock and warrants       5,349,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
     
2014 Private Placement [Member] | Warrant [Member]              
Common Stock [Line Items]              
Fair value of stock and warrants       $ 4,911,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember