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           Related Party Transactions - Additional Information (Detail) (USD $) 
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        12 Months Ended | 1 Months Ended | |
|---|---|---|---|
| 
           Dec. 31, 2014 
         | 
        
           Dec. 31, 2013 
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           Oct. 31, 2014 
         | 
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| Related Party Transaction [Line Items] | |||
| Interest own in percent by principal stockholder or director | 12.40%cndo_RelatedPartyOtherInvestmentPercentageInEntityByPrincipalStockholderOrDirector | 14.10%cndo_RelatedPartyOtherInvestmentPercentageInEntityByPrincipalStockholderOrDirector | |
| Costs and Expenses, Related Party | $ 141,000us-gaap_CostsAndExpensesRelatedParty | $ 0us-gaap_CostsAndExpensesRelatedParty | |
| Opus Point Partners Management, LLC [Member] | Desk Share Agreement [Member] | |||
| Related Party Transaction [Line Items] | |||
| Operating Leases, Area of Land, Percentage | 
20.00%cndo_OperatingLeasesAreaOfLandPercentage / us-gaap_CounterpartyNameAxis = cndo_OpusPointPartnersManagementLlcMember / us-gaap_LeaseArrangementTypeAxis = cndo_DeskShareAgreementMember  | 
      ||
| Payments for Rent | 
200,000us-gaap_PaymentsForRent / us-gaap_CounterpartyNameAxis = cndo_OpusPointPartnersManagementLlcMember / us-gaap_LeaseArrangementTypeAxis = cndo_DeskShareAgreementMember  | 
      ||
| Accrued Rent | 
100,000us-gaap_AccruedRentCurrentAndNoncurrent / us-gaap_CounterpartyNameAxis = cndo_OpusPointPartnersManagementLlcMember / us-gaap_LeaseArrangementTypeAxis = cndo_DeskShareAgreementMember  | 
        ||
| Lessee Leasing Arrangements, Operating Leases, Term of Contract | 5 years | ||
| TG Therapeutics, Inc [Member] | Desk Share Agreement [Member] | |||
| Related Party Transaction [Line Items] | |||
| Operating Leases, Area of Land, Percentage | 
40.00%cndo_OperatingLeasesAreaOfLandPercentage / us-gaap_CounterpartyNameAxis = cndo_TgTherapeuticsIncMember / us-gaap_LeaseArrangementTypeAxis = cndo_DeskShareAgreementMember  | 
      ||
| Payments for Rent | 
200,000us-gaap_PaymentsForRent / us-gaap_CounterpartyNameAxis = cndo_TgTherapeuticsIncMember / us-gaap_LeaseArrangementTypeAxis = cndo_DeskShareAgreementMember  | 
      ||
| Accrued Rent | 
$ 100,000us-gaap_AccruedRentCurrentAndNoncurrent / us-gaap_CounterpartyNameAxis = cndo_TgTherapeuticsIncMember / us-gaap_LeaseArrangementTypeAxis = cndo_DeskShareAgreementMember  | 
        ||
| Lessee Leasing Arrangements, Operating Leases, Term of Contract | 5 years | ||
| Executive Vice Chairman [Member] | |||
| Related Party Transaction [Line Items] | |||
| Interest own in percent by principal stockholder or director | 
14.90%cndo_RelatedPartyOtherInvestmentPercentageInEntityByPrincipalStockholderOrDirector / us-gaap_RelatedPartyTransactionAxis = cndo_ExecutiveViceChairmanMember  | 
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- Definition 
          Operating Leases, Area of Land, Percentage No definition available. 
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- Definition 
          Related party other investment percentage in entity by principal stockholder or director. No definition available. 
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- Definition 
          Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Costs of sales and operating expenses for the period incurred from transactions with related parties. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available. 
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- Definition 
          Cash payments to lessor's for use of assets under operating leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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