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Note 3 - Business Combinations (Details) - Identifiable Intangible Assets Acquired in Connection with the iML Acquisition (Integrated Memory Logic Limited [Member], USD $)
In Thousands, unless otherwise specified
Jun. 03, 2014
Jun. 03, 2013
Acquired Finite-Lived Intangible Assets [Line Items]    
Identifiable intangible assets $ 80,060us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill $ 80,060us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Developed Technology Rights [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Identifiable intangible assets   55,780us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
In Process Research and Development [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Identifiable intangible assets   8,100us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
Customer Relationships [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Identifiable intangible assets   15,060us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Trade Names [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Identifiable intangible assets   $ 1,120us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember