Note 15 - Business Segment Information - Net Sales And Long-lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Revenue	$ 472,618	$ 455,713	$ 453,217
Long-term Assets	140,588	132,074	133,913
UNITED STATES
Revenue	470,420	454,373	451,418
Long-term Assets	140,588	132,074	133,913
Non-US [Member]
Revenue	2,198	1,340	1,799
Long-term Assets	$ 0	$ 0	$ 0