Note 11 - Employee Benefit Plans - Projected Benefit Obligation Reconciliation for SERP (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Oct. 02, 2021
Benefit obligation at beginning of year	$ 11,779	$ 12,888	$ 11,610
Service cost	333	399	312
Interest cost	518	347	316
Actuarial (gain) loss	(900)	(1,650)	855
Distributions	(198)	(205)	(205)
Benefit obligation at end of year	11,532	11,779	12,888
Actual employer contributions	198	205	205
Actual distributions	(198)	(205)	(205)
Plan assets at fair value at end of year	0	0	0
Funded status	(11,532)	(11,779)	(12,888)
Net amount recognized	(11,532)	(11,779)	(12,888)
Unrecognized net loss	373	1,285	3,213
Net amount recognized	373	1,285	3,213
Net (gain) loss	(900)	(1,650)	855
Amortization of net loss	(13)	(278)	(215)
Total recognized in other comprehensive (loss) income	$ (913)	$ (1,928)	$ 640