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Joint Development Agreement with CO2 Solutions (Details) (USD $)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 15, 2009
Joint Development Agreement with CO2 solutions (Textual) [Abstract]        
Other than Temporary Impairment Losses, Investments $ 0us-gaap_ImpairmentOfInvestments $ 0us-gaap_ImpairmentOfInvestments $ 800,000us-gaap_ImpairmentOfInvestments  
CO2 Solutions [Member]        
Joint Development Agreement with CO2 solutions (Textual) [Abstract]        
Number of shares acquired in joint venture (shares)       10,000,000us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= cdxs_CoTwoSolutionsMember
Percentage of common shares outstanding at the time of investment (percent)       16.60%us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= cdxs_CoTwoSolutionsMember
Statutory resale restriction, expiry period (months)       4 months
Statutory resale restriction, expiry date       Apr. 15, 2010
Expiration period of original joint development agreement 2011-01