Note 13 - Earnings Per Share - Basic and Diluted Earnings Per Share Attributable to Common Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Net earnings	$ 5,598	$ 36,266	$ 22,548
Basic weighted average shares outstanding (in shares)	19,243	19,079	19,011
Dilutive effect of stock-based compensation (in shares)	97	198	206
Diluted weighted average shares outstanding (in shares)	19,340	19,277	19,217
Net earnings per share:
Basic (in dollars per share)	$ 0.29	$ 1.90	$ 1.19
Diluted (in dollars per share)	$ 0.29	$ 1.88	$ 1.17