Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Additional Information (Detail)

v2.4.1.9
Significant Accounting Policies - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Segment
Dec. 31, 2013
Significant Accounting Policies [Line Items]    
Marketable investments $ 0us-gaap_MarketableSecurities $ 0us-gaap_MarketableSecurities
Restricted cash 13,728us-gaap_RestrictedCashAndCashEquivalentsNoncurrent  
Estimated useful life of all property and equipment 3 years  
Reduction in research and development expense 49,000crbp_ResearchAndDevelopmentExpenseReduction 205,000crbp_ResearchAndDevelopmentExpenseReduction
Operating segments 1us-gaap_NumberOfOperatingSegments  
Valuation allowance 100.00%crbp_DeferredTaxAssetsValuationAllowancePercentage  
Uncertain tax position 0us-gaap_LiabilityForUncertainTaxPositionsCurrent 0us-gaap_LiabilityForUncertainTaxPositionsCurrent
Impairment charges $ 0us-gaap_AssetImpairmentCharges $ 0us-gaap_AssetImpairmentCharges
Maximum [Member]    
Significant Accounting Policies [Line Items]    
Cash and cash equivalents maturity period 3 months  
Minimum [Member]    
Significant Accounting Policies [Line Items]    
Marketable investments maturity period 3 months