Document And Entity Information - shares	6 Months Ended
	Sep. 27, 2015	Nov. 03, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	Exar Corporation
Trading Symbol	exar
Document Type	10-Q
Current Fiscal Year End Date	--03-27
Entity Common Stock, Shares Outstanding		48,415,278
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	Sep. 27, 2015
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2