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		9 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Net earnings	$ 12,868	$ 6,869	$ 26,858	$ 18,749
Basic weighted average shares outstanding (in shares)	19,070	19,025	19,054	19,003
Dilutive effect of stock-based compensation (in shares)	204	200	198	216
Diluted weighted average shares outstanding (in shares)	19,274	19,225	19,252	19,219
Net earnings per share:
Basic (in dollars per share)	$ 0.67	$ 0.36	$ 1.41	$ 0.99
Diluted (in dollars per share)	$ 0.67	$ 0.36	$ 1.40	$ 0.98