Document And Entity Information	9 Months Ended
	Dec. 28, 2014	Feb. 04, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	Exar Corporation
Document Type	10-Q
Current Fiscal Year End Date	--03-29
Entity Common Stock, Shares Outstanding		47,443,328
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	Dec. 28, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3