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Note 19 - Segment and Geographic Information (Details) - Major Distributors of Net Accounts Receivable (Customer Concentration Risk [Member], Accounts Receivable [Member])
 12 Months Ended
Mar. 29, 2015
Mar. 30, 2014
Distributor E [Member]    
Note 19 - Segment and Geographic Information (Details) - Major Distributors of Net Accounts Receivable [Line Items]    
Distributor 12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= exar_DistributorEMember		    [1]
Distributor B [Member]    
Note 19 - Segment and Geographic Information (Details) - Major Distributors of Net Accounts Receivable [Line Items]    
Distributor 11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= exar_DistributorBMember		 17.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= exar_DistributorBMember
Distributor D [Member]    
Note 19 - Segment and Geographic Information (Details) - Major Distributors of Net Accounts Receivable [Line Items]    
Distributor 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= exar_DistributorDMember		 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= exar_DistributorDMember
Customer D [Member]    
Note 19 - Segment and Geographic Information (Details) - Major Distributors of Net Accounts Receivable [Line Items]    
Distributor 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= exar_CustomerDMember		    [1]
Distributor A [Member]    
Note 19 - Segment and Geographic Information (Details) - Major Distributors of Net Accounts Receivable [Line Items]    
Distributor    [1] 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= exar_DistributorAMember
Distributor C [Member]    
Note 19 - Segment and Geographic Information (Details) - Major Distributors of Net Accounts Receivable [Line Items]    
Distributor    [1] 12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= exar_DistributorCMember
[1] Net accounts receivable for this distributor for this period were less than 10% of our net accounts receivables.