XML 13 R1.htm IDEA: XBRL DOCUMENT v3.3.1.900
Document and Entity Information - shares
9 Months Ended
Dec. 31, 2015
Feb. 01, 2016
Document and Entity Information    
Entity Registrant Name ITERIS, INC.  
Entity Central Index Key 0000350868  
Document Type 10-Q  
Document Period End Date Dec. 31, 2015  
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   32,038,329
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3