Related Party Transaction (Details) (Future Electronics Inc. [Member])	3 Months Ended
Jul. 01, 2012	Apr. 01, 2012
Future Electronics Inc. [Member]
Related party contributions to our total net sales
Future	34.00%	32.00%

Percentage of aggregate net sales contributed by related parties.

No definition available.

Name:	exar_PercentageOfAggregateNetSalesContributedByRelatedParties
Namespace Prefix:	exar_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration