Note 11 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Oct. 02, 2021
Service cost	$ 333	$ 399	$ 312
Interest cost	518	347	316
Amortization of net loss	13	278	215
Net periodic pension cost	$ 864	$ 1,024	$ 843