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Note M - Share-based Compensation (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 30, 2015
Mar. 27, 2015
Mar. 10, 2015
Sep. 27, 2015
Sep. 28, 2014
Sep. 27, 2015
Sep. 28, 2014
Sep. 27, 2014
Mar. 29, 2015
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 $ 210,000 $ 376,000 $ 401,000 $ 401,000  
Share Based Compensation Total Unamortized Compensation Expense       $ 1,426,000   $ 1,426,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition           2 years 152 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-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                 4 years
Share Price   $ 73.56