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v3.21.1

Note 1 - Description of Business (Details Textual) | Dec. 31, 2020 a
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Area of Land (Acre) | 45,000
California, Cadiz Valley [Member] |
Area of Land (Acre) | 35,000
California, Danby Dry Lake [Member] |
Area of Land (Acre) | 2,000
California, Piute Valley [Member] |
Area of Land (Acre) | 9,000

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- Definition Area of land held. + References No definition available. + Details
Name: | us-gaap_AreaOfLand
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | srt_StatementGeographicalAxis=cdzi_CaliforniaCadizValleyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=cdzi_CaliforniaDanbyDryLakeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=cdzi_CaliforniaPiuteValleyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |