Annual report pursuant to Section 13 and 15(d)

Warrants - Additional Information (Detail)

Warrants - Additional Information (Detail) (USD $)	1 Months Ended			6 Months Ended	12 Months Ended
Warrants - Additional Information (Detail) (USD $)	Aug. 31, 2014	Jun. 30, 2013	Oct. 31, 2009	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Warrant exercisable term	5 years		5 years
Number of shares of common stock called by warrants	162,539	301,778	27,839		33,333	301,778
Warrants, exercise price per share	$ 1.00invest_InvestmentWarrantsExercisePrice	$ 0.66invest_InvestmentWarrantsExercisePrice	$ 0.60invest_InvestmentWarrantsExercisePrice
Changes in fair value of derivative warrant liability				$ 28,448us-gaap_FairValueAdjustmentOfWarrants	$ 28,448us-gaap_FairValueAdjustmentOfWarrants	$ (1,978)us-gaap_FairValueAdjustmentOfWarrants
Estimated fair value of warrants	55,000crbp_FairValueOfWarrantIssued
Additional warrants issued		48,222
2014 Private Placement [Member]
Class of Warrant or Right [Line Items]
Warrant exercisable term					5 years
Number of shares of common stock called by warrants					10,260,000
Placement Agent Member \| 2014 Private Placement [Member]
Class of Warrant or Right [Line Items]
Warrant exercisable term					5 years
Number of shares of common stock called by warrants					2,047,000
Warrants, exercise price per share					$ 1.00
Debt instrument redemption description					These warrants have a provision that permits the Company to call and redeem the warrants after a thirty day notice period if the stock trades at $2.50 or greater on a volume weighted average basis for at least twenty consecutive trading days
Series A Convertible Preferred Stock [Member] \| Investors And Former Holders Of Series A Convertible Preferred Stock [Member] \| 2014 Private Placement [Member]
Class of Warrant or Right [Line Items]
Warrant exercisable term					5 years
Number of shares of common stock called by warrants					11,177,612
Warrants, exercise price per share					$ 1.00
Interest Expense [Member]
Class of Warrant or Right [Line Items]
Changes in fair value of derivative warrant liability			1,005
General and Administrative Expense [Member]
Class of Warrant or Right [Line Items]
Estimated fair value of warrants		$ 21,910