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Stock-Based Compensation (Stock-Based Compensation Expense) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Schedule of stock-based compensation expense    
Stock-based compensation $ 1,285us-gaap_ShareBasedCompensation $ 1,229us-gaap_ShareBasedCompensation
Stock options [Member]    
Schedule of stock-based compensation expense    
Stock-based compensation 248us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 276us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Restricted stock units [Member]    
Schedule of stock-based compensation expense    
Stock-based compensation 792us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 869us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
Performance stock units [Member]    
Schedule of stock-based compensation expense    
Stock-based compensation 245us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cdxs_PerformanceStockUnitsMember		 84us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= cdxs_PerformanceStockUnitsMember
Research and development [Member]    
Schedule of stock-based compensation expense    
Stock-based compensation 291us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember		 239us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
Selling, general and administrative [Member]    
Schedule of stock-based compensation expense    
Stock-based compensation $ 994us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= cdxs_SalesGeneralAndAdministrativeMember		 $ 990us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= cdxs_SalesGeneralAndAdministrativeMember