Note 8 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Interest cost	$ 130	$ 87
Service cost	83	100
Recognized net actuarial loss	3	69
Net periodic pension cost	$ 216	$ 256