Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v2.4.1.9
Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Line Items]      
Deferred Tax Assets, Valuation Allowance $ 50,567,000us-gaap_DeferredTaxAssetsValuationAllowance $ 41,142,000us-gaap_DeferredTaxAssetsValuationAllowance  
Effective Income Tax Rate Reconciliation Prior Year State Net Operating Loss True Up   1.00%cndo_EffectiveIncometaxRateReconciliationPriorYearStateNetOperatingLossTrueUp 5.00%cndo_EffectiveIncometaxRateReconciliationPriorYearStateNetOperatingLossTrueUp
Effective Income Tax Rate Reconciliation Prior Year Federal Net Operating Loss True Up 0.00%cndo_EffectiveIncomeTaxRateReconciliationPriorYearFederaNetOperatingLossTrueUp    
Tax Payer Relief Act Research Credit Extension Period 2 years    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 9,400,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount    
Orphan Drug Tax Credit [Member]      
Income Tax Disclosure [Line Items]      
Tax Credit Carryforward, Amount 2,100,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_CreditFacilityAxis
= cndo_OrphanDrugTaxCreditMember 		   
Research Tax Credit Carryforward [Member]      
Income Tax Disclosure [Line Items]      
Tax Credit Carryforward, Amount 3,800,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_ResearchMember 		   
Domestic Tax Authority [Member]      
Income Tax Disclosure [Line Items]      
Operating Loss Carryforwards 104,000,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember 		   
Domestic Tax Authority [Member] | Additional Paid-in Capital [Member]      
Income Tax Disclosure [Line Items]      
Operating Loss Carryforwards 1,800,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember 		   
State and Local Jurisdiction [Member]      
Income Tax Disclosure [Line Items]      
Operating Loss Carryforwards 50,700,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember 		   
State and Local Jurisdiction [Member] | Additional Paid-in Capital [Member]      
Income Tax Disclosure [Line Items]      
Operating Loss Carryforwards $ 1,600,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember