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. 02, 2021	Dec. 28, 2019
Interest cost	$ 79	$ 82
Service cost	78	83
Recognized net actuarial loss	54	72
Net periodic pension cost	$ 211	$ 237