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Note 3 - Business Combinations (Details) - Business Acquistion Purchase Price (Integrated Memory Logic Limited [Member], USD $)
In Thousands, unless otherwise specified
0 Months Ended 1 Months Ended
Jun. 03, 2014
Sep. 28, 2014
Integrated Memory Logic Limited [Member]
   
Note 3 - Business Combinations (Details) - Business Acquistion Purchase Price [Line Items]    
Cash $ 206,411us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember
 
Consideration for the acquisition of non-controlling interests 17,872us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember
 
Fair value of assumed iML employee options 3,835us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember
 
Total purchase price $ 228,118us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember
$ 18,900us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exar_IntegratedMemoryLogicLimitedMember