Note 11 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Service cost	$ 338	$ 297	$ 310
Interest cost	334	384	345
Amortization of net loss	294	140	150
Net periodic pension cost	$ 966	$ 821	$ 805