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Note 5 - Employee Benefit Plans - The Components of Net Periodic Post-retirement Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 29, 2025
Mar. 30, 2024
Mar. 25, 2023
Service cost $ 13 $ 14 $ 17
Interest cost 56 60 45
Amortization of prior service cost 10 15 1
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax 79 89 63
Amortization of prior service cost (10) (15) (1)
Prior service cost 0 0 193
Net actuarial gain (89) (85) (185)
Total recognized in net periodic benefit cost and other comprehensive income (loss) (20) (11) 70
Unrecognized prior service cost $ (36) $ 63 $ 163