Note 5 - Restructuring - Restructuring Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 03, 2020
Liability as of October 2, 2021	$ 10	$ 171
Restructuring charges (recoveries), net	(318)	2,868	$ 1,695
Cash payments	(314)	(1,614)	(1,299)
Non-cash charges	622	(1,415)	(225)
Liability as of October 1, 2022	0	10	171
Employee Severance [Member]
Liability as of October 2, 2021	0	0
Restructuring charges (recoveries), net	0	13	182
Cash payments	0	(13)	(182)
Non-cash charges	0	0	0
Liability as of October 1, 2022	0	0	0
Equipment Relocation [Member]
Liability as of October 2, 2021	0	20
Restructuring charges (recoveries), net	0	423	482
Cash payments	0	(443)	(462)
Non-cash charges	0	0	0
Liability as of October 1, 2022	0	0	20
Facility Closing [Member]
Liability as of October 2, 2021	10	151
Restructuring charges (recoveries), net	304	1,017	806
Cash payments	(314)	(1,158)	(655)
Non-cash charges			0
Liability as of October 1, 2022	0	10	151
Asset Impairments [Member]
Liability as of October 2, 2021	0	0
Restructuring charges (recoveries), net	0	1,415	343
Cash payments	0	0	0
Non-cash charges	0	(1,415)	(343)
Liability as of October 1, 2022	0	0	0
Gain on Sale of Property and Equipment [Member]
Liability as of October 2, 2021	0	0
Restructuring charges (recoveries), net	(622)	0	(118)
Cash payments	0	0	0
Non-cash charges	622	0	118
Liability as of October 1, 2022	$ 0	$ 0	$ 0