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Note A - Summary of Significant Accounting Policies - Calculation of EPS (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Sep. 25, 2021
Sep. 26, 2020
Sep. 28, 2019
Net Income available to common stockholders $ 55,607 $ 18,305 $ 94,819
Net Income available to common stockholders (in shares) 19,013 18,901 18,812
Net Income available to common stockholders (in dollars per share) $ 2.92 $ 0.97 $ 5.04
Options, shares $ 0 $ 0 $ 0
Options, shares (in shares) 120 131 147
Options, per share (in dollars per share) $ (0.01) $ (0.01) $ (0.04)
Net Income available to common stockholders plus assumed conversions $ 55,607 $ 18,305 $ 94,819
Net Income available to common stockholders plus assumed conversions (in shares) 19,133 19,032 18,959
Net Income available to common stockholders plus assumed conversions (in dollars per share) $ 2.91 $ 0.96 $ 5.00
Options, per share (in dollars per share) $ 0.01 $ 0.01 $ 0.04