| Document And Entity Information | Nov. 13, 2023 |
| Document Information [Line Items] | |
| Entity, Registrant Name | Cadiz Inc. |
| Document, Type | 8-K |
| Document, Period End Date | Nov. 13, 2023 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 0-12114 |
| Entity, Tax Identification Number | 77-0313235 |
| Entity, Address, Address Line One | 550 S. Hope Street |
| Entity, Address, Address Line Two | Suite 2850 |
| Entity, Address, City or Town | Los Angeles |
| Entity, Address, State or Province | CA |
| Entity, Address, Postal Zip Code | 90071 |
| City Area Code | 213 |
| Local Phone Number | 271-1600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0000727273 |
| CommonStock Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | CDZI |
| Security Exchange Name | NASDAQ |
| DepositaryShares Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares |
| Trading Symbol | CDZIP |
| Security Exchange Name | NASDAQ |
