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Note K - Share-based Compensation - Compensation Cost Charged to Expense under All Stock-based Incentive Awards (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Dec. 28, 2014
Dec. 29, 2013
Stock options $ 228us-gaap_AllocatedShareBasedCompensationExpense $ 192us-gaap_AllocatedShareBasedCompensationExpense $ 629us-gaap_AllocatedShareBasedCompensationExpense $ 530us-gaap_AllocatedShareBasedCompensationExpense
Employee Stock Option [Member]        
Stock options 93us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 56us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 224us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 168us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Restricted Stock [Member]        
Stock options $ 135us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 $ 136us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 $ 405us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 $ 362us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember