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           Net Loss per Share (Details 1) (USD $) 
        In Thousands, except Per Share data, unless otherwise specified  | 
        12 Months Ended | |
|---|---|---|
| 
           Dec. 31, 2014 
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           Dec. 31, 2013 
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| Earnings Per Share [Abstract] | ||
| Options to purchase common stock | $ 19,600us-gaap_OriginationOfLoanToPurchaseCommonStock | $ 4,403us-gaap_OriginationOfLoanToPurchaseCommonStock | 
| Warrants to purchase common stock | 16,669us-gaap_ProceedsFromRepaymentOfLoansToPurchaseCommonStock | 21,169us-gaap_ProceedsFromRepaymentOfLoansToPurchaseCommonStock | 
| Cocrystal Discover, Inc. Series A convertible preferred stock | $ 9,670cocp_SeriesConvertiblePreferredStock | |
| Total | $ 36,269us-gaap_IncomeLossFromExtraordinaryItemsNetOfTaxPerDilutedShare | $ 35,242us-gaap_IncomeLossFromExtraordinaryItemsNetOfTaxPerDilutedShare | 
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- Definition 
          custom:SeriesConvertiblePreferredStock No definition available. 
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- Details 
          
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- Definition 
          The amount of net income (loss) for the period attributable to extraordinary items that is available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Cash outflow for origination of loan for purchasing common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Cash inflow from repayment of loans for purchasing common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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