Note 8 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 01, 2023	Apr. 02, 2022	Apr. 01, 2023	Apr. 02, 2022
Interest cost	$ 130	$ 87	$ 260	$ 174
Service cost	83	100	166	200
Recognized net actuarial loss	3	69	6	138
Net periodic pension cost	$ 216	$ 256	$ 432	$ 512