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Note K - Share-based Compensation (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 30, 2015
Mar. 27, 2015
Mar. 10, 2015
Jun. 26, 2016
Jun. 28, 2015
Mar. 29, 2016
Excluding Dividend [Member]            
Share Price   $ 48.56        
Special Cash Dividend [Member]            
Common Stock, Dividends, Per Share, Declared   25 $ 25      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 75,745     0   50,000
Allocated Share-based Compensation Expense       $ 173,000 $ 203,000  
Share Based Compensation Total Unamortized Compensation Expense       $ 908,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition       1 year 300 days    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 35.576         $ 53.89
Share Based Compensation Arrangement by Share Based Payment Award Option Life           5 years
Share Price   $ 73.56