Annual report pursuant to Section 13 and 15(d)

Nature of Operations - Additional Information (Detail)

v2.4.1.9
Nature of Operations - Additional Information (Detail) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Apr. 11, 2014
Aug. 31, 2014
Dec. 31, 2013
Jun. 30, 2013
Oct. 31, 2009
Nature of Operations [Line Items]            
Number of common shares called by warrants 33,333us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights   162,539us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 27,839us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Common stock, shares outstanding 25,938,332us-gaap_CommonStockSharesOutstanding     6,964,788us-gaap_CommonStockSharesOutstanding    
Private placement of equity, net proceeds $ 8,402,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement          
JB Therapeutics Inc. [Member]            
Nature of Operations [Line Items]            
Conversion of stock, shares issued   9,000,000us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
       
Number of shares converted to common stock   5,964,649us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
       
Number of common shares called by warrants   377,839us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
       
Number of options to purchase shares of common stock   905,334crbp_OptionToPurchaseCommonStockShares
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
       
Exchange ratio of shares 1.5089crbp_CommonStockExchangeRatio
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
    1.5089crbp_CommonStockExchangeRatio
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
   
Common stock, shares outstanding   6,000,000us-gaap_CommonStockSharesOutstanding
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
       
Series A Preferred Stock [Member] | JB Therapeutics Inc. [Member]            
Nature of Operations [Line Items]            
Number of common shares called by warrants   917,612us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
       
Minimum [Member] | JB Therapeutics Inc. [Member]            
Nature of Operations [Line Items]            
Common stock warrants, exercise price   0.60us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
Options exercise price   0.11crbp_ExercisePriceOfOption
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
Maximum [Member] | JB Therapeutics Inc. [Member]            
Nature of Operations [Line Items]            
Common stock warrants, exercise price   0.66us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
       
Options exercise price   0.17crbp_ExercisePriceOfOption
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember