Document and Entity Information	9 Months Ended
	Dec. 31, 2012	Feb. 01, 2013
Document and Entity Information
Entity Registrant Name	ITERIS, INC.
Entity Central Index Key	0000350868
Document Type	10-Q
Document Period End Date	Dec. 31, 2012
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		33,286,041
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3