Note 13 - Matching Contributions to Exar Savings Plan (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 27, 2016	Mar. 29, 2015	Mar. 30, 2014
Matching contributions	$ 343	$ 421	$ 373

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration