Note 10 - 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. 01, 2023	Dec. 31, 2022	Apr. 02, 2022	Jan. 01, 2022	Apr. 01, 2023	Apr. 02, 2022
Net earnings	$ 5,101	$ 11,123	$ 39,017	$ 23,129	$ 16,224	$ 62,146
Basic weighted average shares outstanding (in shares)	19,503		19,492		19,514	19,487
Dilutive effect of stock-based compensation (in shares)	59		131		59	128
Diluted weighted average shares outstanding (in shares)	19,562		19,623		19,573	19,615
Basic (in dollars per share)	$ 0.26		$ 2.00		$ 0.83	$ 3.19
Diluted (in dollars per share)	$ 0.26		$ 1.99		$ 0.83	$ 3.17