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Note 11 - Commitments and Contingencies (Details Textual) | Dec. 31, 2019 USD ($)
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Water Project [Member] |
Deferred Revenue, Total | $ 750,000

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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DeferredRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=cdzi_WaterProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |