Annual report pursuant to Section 13 and 15(d)

Warrants to Purchase Common Stock - Additional Information (Detail)

v2.4.1.9
Warrants to Purchase Common Stock - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Warrants To Purchase Common Stock [Line Items]      
Proceeds From Issuance Of Common Stock $ 4,117,000us-gaap_ProceedsFromIssuanceOfCommonStock $ 92,399,000us-gaap_ProceedsFromIssuanceOfCommonStock $ 28,855,000us-gaap_ProceedsFromIssuanceOfCommonStock
Non Employee Warrants [Member]      
Warrants To Purchase Common Stock [Line Items]      
Stock Issued During Period Shares warrants Exercised   78,710cndo_StockIssuedDuringPeriodSharesWarrantsExercised
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeWarrantsMember
 
Cashless Exercise Of Warrants   153,415cndo_CashlessExerciseOfWarrants
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeWarrantsMember
 
Investment Warrants, Exercise Price   $ 5.00invest_InvestmentWarrantsExercisePrice
/ us-gaap_AwardTypeAxis
= cndo_NonEmployeeWarrantsMember
 
Common Stock [Member]      
Warrants To Purchase Common Stock [Line Items]      
Stock Issued During Period Shares New Issues     5,750,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
Common Stock [Member] | Warrants to Purchase Series C Shares [Member]      
Warrants To Purchase Common Stock [Line Items]      
Stock Issued During Period Shares warrants Exercised   78,636cndo_StockIssuedDuringPeriodSharesWarrantsExercised
/ us-gaap_DebtSecurityAxis
= cndo_WarrantsToPurchaseSeriesCSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Cashless Exercise Of Warrants   328,510cndo_CashlessExerciseOfWarrants
/ us-gaap_DebtSecurityAxis
= cndo_WarrantsToPurchaseSeriesCSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Investment Warrants, Exercise Price   $ 5.45invest_InvestmentWarrantsExercisePrice
/ us-gaap_DebtSecurityAxis
= cndo_WarrantsToPurchaseSeriesCSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Stock Issued During Period Shares New Issues   340us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_DebtSecurityAxis
= cndo_WarrantsToPurchaseSeriesCSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Proceeds From Issuance Of Common Stock   $ 1,098us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_DebtSecurityAxis
= cndo_WarrantsToPurchaseSeriesCSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Class of Warrant or Right, Outstanding 711,895us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_DebtSecurityAxis
= cndo_WarrantsToPurchaseSeriesCSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember