Note 11 - Employee Benefit Plans - Projected Benefit Obligation Reconciliation for SERP (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Benefit obligation at beginning of year	$ 12,522	$ 11,532	$ 11,779
Service cost	276	252	333
Interest cost	603	590	518
Actuarial (gain) loss	(754)	428	(900)
Distributions	(416)	(280)	(198)
Benefit obligation at end of year	12,231	12,522	11,532
Actual employer contributions	416	280	198
Actual distributions	(416)	(280)	(198)
Plan assets at fair value at end of year	0	0	0
Funded status	(12,231)	(12,522)	(11,532)
Net amount recognized	(12,231)	(12,522)	(11,532)
Unrecognized net loss	47	801	373
Net amount recognized	47	801	373
Net (gain) loss	(754)	428	(900)
Amortization of net loss	0	0	(13)
Total recognized in other comprehensive income	$ (754)	$ 428	$ (913)