Annual report pursuant to section 13 and 15(d)

Document And Entity Information

Document And Entity Information (USD $)
12 Months Ended
Mar. 31, 2013
Jun. 10, 2013
Sep. 30, 2012
Document and Entity Information [Abstract]      
Entity Registrant Name Exar Corporation    
Document Type 10-K    
Current Fiscal Year End Date --03-31    
Entity Common Stock, Shares Outstanding   46,936,401  
Entity Public Float     $ 153,900,000
Amendment Flag false    
Entity Central Index Key 0000753568    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Mar. 31, 2013    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus FY