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Nature of Operations - Additional Information (Detail) (USD $)
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3 Months Ended |
0 Months Ended |
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Mar. 31, 2015
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Apr. 11, 2014
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Dec. 31, 2014
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Aug. 31, 2014
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Mar. 31, 2014
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Jun. 30, 2013
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Mar. 31, 2013
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Oct. 31, 2009
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Dec. 31, 2013
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| Nature of Operations [Line Items] |
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| Number of common shares called by warrants |
13,647,848us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
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162,539us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
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301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
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301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
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27,839us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
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| Common stock, shares outstanding |
26,003,304us-gaap_CommonStockSharesOutstanding
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25,938,332us-gaap_CommonStockSharesOutstanding
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25,938,332us-gaap_CommonStockSharesOutstanding
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| Private placement of equity, net proceeds |
$ 6,000,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
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| JB Therapeutics Inc. [Member] |
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| Nature of Operations [Line Items] |
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| Conversion of stock, shares issued |
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9,000,000us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
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| Number of shares converted to common stock |
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5,964,649us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
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| Number of common shares called by warrants |
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377,839us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
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| Number of options to purchase shares of common stock |
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905,334crbp_OptionToPurchaseCommonStockShares
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
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| Exchange ratio of shares |
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1.5089crbp_CommonStockExchangeRatio
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
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1.5089crbp_CommonStockExchangeRatio
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
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| Common stock, shares outstanding |
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6,000,000us-gaap_CommonStockSharesOutstanding
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
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| Series A Preferred Stock [Member] | JB Therapeutics Inc. [Member] |
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| Nature of Operations [Line Items] |
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| Number of common shares called by warrants |
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917,612us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
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| Minimum [Member] | JB Therapeutics Inc. [Member] |
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| Nature of Operations [Line Items] |
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| Common stock warrants, exercise price |
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0.60us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Options exercise price |
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0.11crbp_ExercisePriceOfOption
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Maximum [Member] | JB Therapeutics Inc. [Member] |
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| Nature of Operations [Line Items] |
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| Common stock warrants, exercise price |
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0.66us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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| Options exercise price |
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0.17crbp_ExercisePriceOfOption
/ us-gaap_BusinessAcquisitionAxis
= crbp_JbTherapeuticsIncMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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