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Note 3 - Business Combinations (Details) - Allocation of the Purchase Price to Tangible and Intangible Assets Acquired and Liabilities (USD $)
In Thousands, unless otherwise specified
0 Months Ended 1 Months Ended
Jan. 14, 2014
Jul. 05, 2013
Mar. 22, 2013
Mar. 29, 2015
Mar. 30, 2014
Mar. 31, 2013
Note 3 - Business Combinations (Details) - Allocation of the Purchase Price to Tangible and Intangible Assets Acquired and Liabilities [Line Items]            
Goodwill       $ 44,871us-gaap_Goodwill $ 30,410us-gaap_Goodwill $ 10,356us-gaap_Goodwill
Stretch, Inc. [Member]            
Note 3 - Business Combinations (Details) - Allocation of the Purchase Price to Tangible and Intangible Assets Acquired and Liabilities [Line Items]            
Tangible assets 2,937exar_BusinessCombinationTotalIdentifiableTangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= exar_StretchIncMember
         
Intangible assets 7,010us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_StretchIncMember
         
Goodwill 667us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_StretchIncMember
         
Liabilities assumed (10,604)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= exar_StretchIncMember
         
Fair value of total consideration transferred 10us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exar_StretchIncMember
         
Cadeka Microcircuits [Member]            
Note 3 - Business Combinations (Details) - Allocation of the Purchase Price to Tangible and Intangible Assets Acquired and Liabilities [Line Items]            
Tangible assets   3,286exar_BusinessCombinationTotalIdentifiableTangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= exar_CadekaMicrocircuitsMember
       
Intangible assets   20,380us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_CadekaMicrocircuitsMember
       
Goodwill   19,387us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_CadekaMicrocircuitsMember
       
Liabilities assumed   (8,216)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= exar_CadekaMicrocircuitsMember
       
Fair value of total consideration transferred   34,837us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exar_CadekaMicrocircuitsMember
       
Altior [Member]            
Note 3 - Business Combinations (Details) - Allocation of the Purchase Price to Tangible and Intangible Assets Acquired and Liabilities [Line Items]            
Tangible assets     302exar_BusinessCombinationTotalIdentifiableTangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= exar_AltiorMember
     
Intangible assets     7,540us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_AltiorMember
     
Goodwill     7,172us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= exar_AltiorMember
     
Liabilities assumed     (136)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= exar_AltiorMember
     
Fair value of total consideration transferred     $ 14,878us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exar_AltiorMember