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Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 28, 2014
Mar. 30, 2014
Accounts receivable, allowances $ 1,215us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,178us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common stock par value $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 100,000,000us-gaap_CommonStockSharesAuthorized 100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares outstanding 47,261,975us-gaap_CommonStockSharesOutstanding 47,336,005us-gaap_CommonStockSharesOutstanding
Related Party [Member]    
Accounts receivable, allowances $ 709us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= exar_RelatedPartyMember
$ 608us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= exar_RelatedPartyMember