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Note 8 - Employee Benefit Plans (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Deferred Compensation Arrangement with Individual, Employer Contribution | $ 62,000 | $ 55,000 | $ 49,000
Three Percent of Base Salary [Member] |  |  |
Defined Benefit Plan, Company Contribution Percentage of a Percentage of Annual Base Salary | 100.00% |  |
Two Percent of Base Salary [Member] |  |  |
Defined Benefit Plan, Company Contribution Percentage of a Percentage of Annual Base Salary | 50.00% |  |

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | cdzi_DefinedBenefitPlanCompanyContributionPercentageOfAPercentageOfAnnualBaseSalary
Namespace Prefix: | cdzi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement. + References No definition available. + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration