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Note 4 - Calculation of EPS (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Mar. 27, 2021
Mar. 28, 2020
Mar. 27, 2021
Mar. 28, 2020
Net Earnings available to common stockholders $ 6,061 $ 7,309 $ 7,839 $ 24,368
Weighted average number of basic shares (in shares) 19,006 18,921 18,971 18,910
(Loss) earnings per basic share (in dollars per share) $ 0.32 $ 0.39 $ 0.41 $ 1.29
Options $ 0 $ 0 $ 0 $ 0
Options (in shares) 124 93 110 169
Options, per share (in dollars per share) $ 0 $ (0.01) $ 0 $ (0.01)
Net Earnings available to common stockholders plus assumed conversions $ 6,061 $ 7,309 $ 7,839 $ 24,368
Weighted average number of diluted shares (in shares) 19,130 19,014 19,081 19,079
(Loss) earnings per diluted share (in dollars per share) $ 0.32 $ 0.38 $ 0.41 $ 1.28