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. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Jun. 29, 2019	Jun. 30, 2018
Net earnings	$ 2,190	$ 1,049	$ 4,126	$ 12,868	$ 5,879	$ 8,111	$ 7,365	$ 26,858
Basic weighted average shares outstanding (in shares)	19,252			19,070			19,239	19,054
Dilutive effect of stock-based compensation (in shares)	82			204			97	198
Diluted weighted average shares outstanding (in shares)	19,334			19,274			19,336	19,252
Basic (in dollars per share)	$ 0.11			$ 0.67			$ 0.38	$ 1.41
Diluted (in dollars per share)	$ 0.11			$ 0.67			$ 0.38	$ 1.40