Note 11 - Earnings Per Share - Basic and Diluted Earnings Per Share Attributable to Common Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Apr. 03, 2021	Jan. 02, 2021	Mar. 28, 2020	Dec. 28, 2019	Apr. 03, 2021	Mar. 28, 2020
Net earnings	$ 14,920	$ 8,143	$ 4,364	$ 555	$ 23,063	$ 4,919
Basic weighted average shares outstanding (in shares)	19,328		19,272		19,319	19,266
Dilutive effect of stock-based compensation (in shares)	189		114		157	112
Diluted weighted average shares outstanding (in shares)	19,517		19,386		19,476	19,378
Basic (in dollars per share)	$ 0.77		$ 0.23		$ 1.19	$ 0.26
Diluted (in dollars per share)	$ 0.76		$ 0.23		$ 1.18	$ 0.25