Annual report pursuant to Section 13 and 15(d)

Stock Plans and Stock-Based Compensation - Employee Stock Purchase Programs (Detail)

v2.4.1.9
Stock Plans and Stock-Based Compensation - Employee Stock Purchase Programs (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 5,546us-gaap_EmployeeBenefitsAndShareBasedCompensation $ 5,902us-gaap_EmployeeBenefitsAndShareBasedCompensation $ 3,638us-gaap_EmployeeBenefitsAndShareBasedCompensation
Employee Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 5,492us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_EmployeeAwardsMember 		4,867us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_EmployeeAwardsMember 		2,408us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_EmployeeAwardsMember
Non-Employee Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 54us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeAwardsMember 		897us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeAwardsMember 		664us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeAwardsMember
Non-Employee Warrants [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 0us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeWarrantsMember 		$ 138us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeWarrantsMember 		$ 566us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeWarrantsMember