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Note L - Stockholders' Equity, Stock Plans and Other Employee Benefit Plans - Compensation Cost Charged to Expense under All Stock-based Incentive Awards (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 29, 2015
Mar. 30, 2014
Mar. 31, 2013
Share-based Compensation Expense $ 859us-gaap_AllocatedShareBasedCompensationExpense $ 721us-gaap_AllocatedShareBasedCompensationExpense $ 627us-gaap_AllocatedShareBasedCompensationExpense
Employee Stock Option [Member]      
Share-based Compensation Expense 318us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 224us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 224us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Restricted Stock [Member]      
Share-based Compensation Expense $ 541us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 $ 497us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 $ 403us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember