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Note 14 - Lease Financing Obligations (Details) (USD $)
1 Months Ended 9 Months Ended
Oct. 31, 2014
Jul. 31, 2012
Dec. 30, 2011
Oct. 31, 2011
Dec. 28, 2014
Dec. 29, 2013
Note 14 - Lease Financing Obligations (Details) [Line Items]            
Capital Lease Obligations, License Term 3 years 3 years 3 years 3 years    
Repayments of Long-term Capital Lease Obligations $ 1,500,000us-gaap_RepaymentsOfLongTermCapitalLeaseObligations       $ 1,007,000us-gaap_RepaymentsOfLongTermCapitalLeaseObligations $ 2,898,000us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
Capital Lease Obligations [Member] | Minimum [Member]            
Note 14 - Lease Financing Obligations (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
 
Capital Lease Obligations [Member] | Maximum [Member]            
Note 14 - Lease Financing Obligations (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
 
Property, Plant and Equipment, Net [Member]            
Note 14 - Lease Financing Obligations (Details) [Line Items]            
Capital Lease Obligations $ 4,400,000us-gaap_CapitalLeaseObligations
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
900,000us-gaap_CapitalLeaseObligations
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
4,500,000us-gaap_CapitalLeaseObligations
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember
5,800,000us-gaap_CapitalLeaseObligations
/ us-gaap_BalanceSheetLocationAxis
= exar_PropertyPlantAndEquipmentNetMember