Document And Entity Information (USD $)	12 Months Ended
	Mar. 29, 2015	Jun. 02, 2015	Sep. 26, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	Exar Corporation
Document Type	10-K
Current Fiscal Year End Date	--03-29
Entity Common Stock, Shares Outstanding		48,047,601
Entity Public Float			$ 198,800,000
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. 29, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY