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Note 15 - Lease Financing Obligation (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 1 Months Ended
Mar. 29, 2015
Mar. 30, 2014
Mar. 31, 2013
Jan. 31, 2015
Oct. 31, 2014
Jul. 31, 2012
Dec. 30, 2011
Oct. 31, 2011
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Capital Lease Obligations Incurred $ 8,842us-gaap_CapitalLeaseObligationsIncurred              
Repayments of Long-term Capital Lease Obligations 1,396us-gaap_RepaymentsOfLongTermCapitalLeaseObligations 3,249us-gaap_RepaymentsOfLongTermCapitalLeaseObligations 2,830us-gaap_RepaymentsOfLongTermCapitalLeaseObligations          
Property, Plant and Equipment, Net [Member] | January 2015 Two Three-Year License [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Capital Lease Obligations Incurred       6,800us-gaap_CapitalLeaseObligationsIncurred
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
/ us-gaap_LeaseArrangementTypeAxis
= exar_JanuaryTwoThousandFifteenTwoThreeYearLicenseMember
       
Property, Plant and Equipment, Net [Member] | January 2015 Two-Year License [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Capital Lease Obligations Incurred       100us-gaap_CapitalLeaseObligationsIncurred
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
/ us-gaap_LeaseArrangementTypeAxis
= exar_JanuaryTwoThousandFifteenTwoYearLicenseMember
       
Property, Plant and Equipment, Net [Member] | October 2014 Three-Year License [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Capital Lease Obligations Incurred         4,400us-gaap_CapitalLeaseObligationsIncurred
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
/ us-gaap_LeaseArrangementTypeAxis
= exar_OctoberTwoThousandFourteenThreeYearLicenseMember
     
Property, Plant and Equipment, Net [Member] | July 2012 Three-Year License [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Capital Lease Obligations Incurred           900us-gaap_CapitalLeaseObligationsIncurred
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
/ us-gaap_LeaseArrangementTypeAxis
= exar_JulyTwoThousandTwelveThreeYearLicenseMember
   
Property, Plant and Equipment, Net [Member] | December 2011 Three-Year License [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Capital Lease Obligations Incurred             4,500us-gaap_CapitalLeaseObligationsIncurred
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
/ us-gaap_LeaseArrangementTypeAxis
= exar_DecemberTwoThousandElevenThreeYearLicenseMember
 
Property, Plant and Equipment, Net [Member] | October 2011 Three-Year License [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Capital Lease Obligations Incurred               5,800us-gaap_CapitalLeaseObligationsIncurred
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
/ us-gaap_LeaseArrangementTypeAxis
= exar_OctoberTwoThousandElevenThreeYearLicenseMember
Minimum [Member] | Capital Lease Obligations [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Debt Instrument, Interest Rate, Effective Percentage 2.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
             
Maximum [Member] | Capital Lease Obligations [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Debt Instrument, Interest Rate, Effective Percentage 7.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
             
January 2015 Two Three-Year License [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Repayments of Long-term Capital Lease Obligations       1,000us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
/ us-gaap_LeaseArrangementTypeAxis
= exar_JanuaryTwoThousandFifteenTwoThreeYearLicenseMember
       
October 2014 Three-Year License [Member]                
Note 15 - Lease Financing Obligation (Details) [Line Items]                
Repayments of Long-term Capital Lease Obligations         $ 1,500us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
/ us-gaap_LeaseArrangementTypeAxis
= exar_OctoberTwoThousandFourteenThreeYearLicenseMember