Note 9 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Interest cost	$ 87	$ 79	$ 261	$ 237
Service cost	100	78	300	234
Recognized net actuarial loss	69	54	207	162
Net periodic pension cost	$ 256	$ 211	$ 768	$ 633