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Note 6 - Long-term Debt (Details) - Carrying Amount of the Company's Outstanding Debt (Parentheticals) | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013
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Note 6 - Long-term Debt (Details) - Carrying Amount of the Company's Outstanding Debt (Parentheticals) [Line Items] |  |  |
Interest rate | 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage |  |
Senior Secured Debt, Due March 5, 2016 [Member] |  |  |
Note 6 - Long-term Debt (Details) - Carrying Amount of the Company's Outstanding Debt (Parentheticals) [Line Items] |  |  |
Interest rate |  | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cdzi_SeniorSecuredDebtDueMarch52016Member | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cdzi_SeniorSecuredDebtDueMarch52016Member
Senior Secured Debt, Due June 30, 2017 [Member] |  |  |
Note 6 - Long-term Debt (Details) - Carrying Amount of the Company's Outstanding Debt (Parentheticals) [Line Items] |  |  |
Interest rate |  | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cdzi_SeniorSecuredDebtDueJune302017Member | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cdzi_SeniorSecuredDebtDueJune302017Member
Convertible Note Instrument, Due March 5, 2018 [Member] |  |  |
Note 6 - Long-term Debt (Details) - Carrying Amount of the Company's Outstanding Debt (Parentheticals) [Line Items] |  |  |
Interest rate |  | 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cdzi_ConvertibleNoteInstrumentDueMarch52018Member | 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cdzi_ConvertibleNoteInstrumentDueMarch52018Member

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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