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Cover - USD ($)
 12 Months Ended
Mar. 31, 2024
Jun. 11, 2024
Sep. 29, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Mar. 31, 2024    
Current Fiscal Year End Date --03-31    
Document Transition Report false    
Entity File Number 001-08762    
Entity Registrant Name ITERIS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 95-2588496    
Entity Address, Address Line One 1250 S. Capital of Texas Hwy., Building 1, Suite 330    
Entity Address, City or Town Austin    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 78746    
City Area Code 512    
Local Phone Number 716-0808    
Title of 12(b) Security Common Stock, $0.10 par value    
Trading Symbol ITI    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 147,728,051
Entity Common Stock, Shares Outstanding   42,975,222  
Documents Incorporated by Reference
Part III of this report incorporates by reference certain information from the registrant’s definitive proxy statement for the 2024 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.
    
Entity Central Index Key 0000350868    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY