Note 9 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Interest cost	$ 87	$ 79
Service cost	100	78
Recognized net actuarial loss	69	54
Net periodic pension cost	$ 256	$ 211