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Note 4 - Other Assets (Details) (Prepaid Rent [Member], USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Prepaid Rent [Member] |  |  |
Note 4 - Other Assets (Details) [Line Items] |  |  |
Amortization of Deferred Charges | $ 115,000 us-gaap_AmortizationOfDeferredCharges / us-gaap_NatureOfExpenseAxis = cdzi_PrepaidRentMember | $ 373,000 us-gaap_AmortizationOfDeferredCharges / us-gaap_NatureOfExpenseAxis = cdzi_PrepaidRentMember | $ 1,088,000 us-gaap_AmortizationOfDeferredCharges / us-gaap_NatureOfExpenseAxis = cdzi_PrepaidRentMember

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Namespace Prefix: | cdzi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of amortization of deferred charges applied against earnings during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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