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Note 8 - Subsequent Event (Details Textual) $ in Millions	Jul. 31, 2020 USD ($)
July 2020 ATM Offering [Member] | Subsequent Event [Member]
At Market Issuance Sales Agreement, Maximum Aggregate Offering Price	$ 30

X

- Definition

The maximum aggregate offering price of common stock to be issued pursuant to the At Market Issuance Sales Agreement.

+ References

No definition available.

+ Details

Name:	cdzi_AtMarketIssuanceSalesAgreementMaximumAggregateOfferingPrice
Namespace Prefix:	cdzi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=cdzi_July2020ATMOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: