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Note 11 - Employee Benefit Plans - Projected Benefit Obligation Reconciliation for SERP (Details) - Supplemental Employee Retirement Plan [Member] - USD ($)
$ in Thousands
 12 Months Ended
Sep. 28, 2024
Sep. 30, 2023
Oct. 01, 2022
Benefit obligation at beginning of year $ 11,532 $ 11,779 $ 12,888
Service cost 252 333 399
Interest cost 590 518 347
Actuarial loss (gain) 428 (900) (1,650)
Distributions (280) (198) (205)
Benefit obligation at end of year 12,522 11,532 11,779
Actual employer contributions 280 198 205
Actual distributions (280) (198) (205)
Plan assets at fair value at end of year 0 0 0
Funded status (12,522) (11,532) (11,779)
Net amount recognized (12,522) (11,532) (11,779)
Unrecognized net loss 801 373 1,285
Net amount recognized 801 373 1,285
Net loss (gain) 428 (900) (1,650)
Amortization of net loss 0 (13) (278)
Total recognized in other comprehensive income $ 428 $ (913) $ (1,928)