Note 4 - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Net Earnings available to common stockholders	$ 7,309	$ 20,354	$ 24,368	$ 37,880
Weighted average number of shares outstanding, basic (in shares)	18,921	18,795	18,910	18,780
Earnings per share, basic (in dollars per share)	$ 0.39	$ 1.08	$ 1.29	$ 2.02
Options	$ 0	$ 0	$ 0	$ 0
Options (in shares)	93	96	169	114
Options, per share (in dollars per share)	$ (0.01)	$ 0	$ (0.01)	$ (0.02)
Net Earnings available to common stockholders plus assumed conversions	$ 7,309	$ 20,354	$ 24,368	$ 37,880
Weighted average number of shares outstanding, diluted (in shares)	19,014	18,891	19,079	18,894
Earnings per share, diluted (in dollars per share)	$ 0.38	$ 1.08	$ 1.28	$ 2.00