Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 03, 2017
Document Information [Line Items]
Entity Registrant Name	CADIZ INC
Entity Central Index Key	0000727273
Trading Symbol	cdzi
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		22,802,060
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Amendment Flag	false