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Note K - Share-based Compensation (Details) (USD $)
3 Months Ended 6 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Sep. 28, 2014
Sep. 29, 2013
Note K - Share-based Compensation (Details) [Line Items]        
Allocated Share-based Compensation Expense $ 210,000 $ 191,000 $ 401,000 $ 338,000
Share-Based Compensation Total Unamortized Compensation Expense 2,273,000   2,273,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year 8 months  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)     50,000  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)     $ 53.89  
Share-Based Compensation Arrangement by Share-Based Payment Award Option Life     5 years  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     4 years  
Restricted Stock [Member]
       
Note K - Share-based Compensation (Details) [Line Items]        
Allocated Share-based Compensation Expense 135,000 135,000 270,000 226,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition       5 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       5 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)       25,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)       $ 49.80
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 1,245,000   $ 1,245,000