Note 13 Earnings Per Share (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
Weighted average shares used in computing per share amount:
Net income	$ 4,882	$ 40,885	$ 43,227	$ 78,837
Weighted average common shares outstanding	70,584	68,821	70,377	68,556
Effect of dilutive stock options and restricted stock units	1,661	2,625	2,052	2,606
Denominator for diluted earnings per share	72,245	71,446	72,429	71,162
Net income per share:
Basic	$ 0.07	$ 0.59	$ 0.61	$ 1.15
Diluted	$ 0.07	$ 0.57	$ 0.60	$ 1.11