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
	Mar. 28, 2020	Dec. 28, 2019	Mar. 30, 2019	Dec. 29, 2018	Mar. 28, 2020	Mar. 30, 2019
Net earnings	$ 4,364	$ 555	$ 1,049	$ 4,126	$ 4,919	$ 5,175
Basic weighted average shares outstanding (in shares)	19,272		19,242		19,266	19,233
Dilutive effect of stock-based compensation (in shares)	114		98		112	105
Diluted weighted average shares outstanding (in shares)	19,386		19,340		19,378	19,338
Basic (in dollars per share)	$ 0.23		$ 0.05		$ 0.26	$ 0.27
Diluted (in dollars per share)	$ 0.23		$ 0.05		$ 0.25	$ 0.27