Annual report pursuant to Section 13 and 15(d)

Stock Options - Additional Information (Detail)

v2.4.1.9
Stock Options - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 193,120us-gaap_ShareBasedCompensation $ 6,141us-gaap_ShareBasedCompensation
Weighted average grant-date fair value, Options granted $ 0.95us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue  
Total fair value of options, Vested 1,732,071us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1  
Share based compensation expense 864,280us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized  
Share based compensation expense, not yet recognized period of recognition 3 years 6 months 4 days  
Two Thousand Fourteen Equity Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Aggregate Common stock available for stock options granted, shares 3,556,691us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= crbp_TwoThousandFourteenEquityIncentivePlanMember
 
Shares available for grant 3,205,952us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= crbp_TwoThousandFourteenEquityIncentivePlanMember
 
Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 193,120us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
$ 6,141us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Expected term in years 6 years 2 months 12 days 6 years 3 months
Stock Options [Member] | Two Thousand Fourteen Equity Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option, Expiration period 10 years