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Note 6 - Related Party Transaction (Details)
Mar. 29, 2015
Mar. 30, 2014
Note 6 - Related Party Transaction (Details) [Line Items]    
Common Stock, Shares, Outstanding 47,745,618us-gaap_CommonStockSharesOutstanding 47,336,005us-gaap_CommonStockSharesOutstanding
Alonim Investments Inc. [Member]    
Note 6 - Related Party Transaction (Details) [Line Items]    
Common Stock, Shares, Outstanding 7,600,000us-gaap_CommonStockSharesOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= exar_AlonimInvestmentsIncMember
 
Percentage Of Common Stock Shares Outstanding 16.00%exar_PercentageOfCommonStockSharesOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= exar_AlonimInvestmentsIncMember