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Note 7 - Long-term Investment (Details) (USD $)
3 Months Ended 9 Months Ended
Mar. 30, 2014
Dec. 28, 2014
Mar. 31, 2013
Note 7 - Long-term Investment (Details) [Line Items]      
Long-term Investments $ 946,000us-gaap_LongTermInvestments $ 903,000us-gaap_LongTermInvestments $ 1,288,000us-gaap_LongTermInvestments
Long-term Investments, Cumulative Impairment Charges   400,000exar_LongTermInvestmentsCumulativeImpairmentCharges  
Skypoint Fund [Member]      
Note 7 - Long-term Investment (Details) [Line Items]      
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures   4,800,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ invest_InvestmentIssuerAxis
= exar_SkypointFundMember
 
Cost-method Investments, Other than Temporary Impairment $ 323,000us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment
/ invest_InvestmentIssuerAxis
= exar_SkypointFundMember
$ 35,000us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment
/ invest_InvestmentIssuerAxis
= exar_SkypointFundMember