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Note 11 - Short-term Debt (Details) - Interest on Short-term Debt (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 29, 2015
Note 11 - Short-term Debt (Details) - Interest on Short-term Debt [Line Items]  
Interest on short-term debt $ 911us-gaap_InterestExpenseDebt
CTBC [Member]  
Note 11 - Short-term Debt (Details) - Interest on Short-term Debt [Line Items]  
Interest on short-term debt 265us-gaap_InterestExpenseDebt
/ us-gaap_DebtInstrumentAxis
= exar_CTBCMember
Stifel Financial Corp. [Member]  
Note 11 - Short-term Debt (Details) - Interest on Short-term Debt [Line Items]  
Interest on short-term debt $ 646us-gaap_InterestExpenseDebt
/ us-gaap_DebtInstrumentAxis
= exar_StifelFinancialCorpMember