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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. 30, 2024
Mar. 25, 2023
Mar. 26, 2022
Service cost $ 14 $ 17 $ 96
Interest cost 60 45 52
Amortization of prior service cost 15 1 1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) 89 63 149
Amortization of prior service cost (15) (1) (1)
Prior service cost 0 193 0
Net actuarial gain (85) (185) (583)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax (100) 7 (584)
Total recognized in net periodic benefit cost and other comprehensive income (loss) (11) 70 (435)
Unrecognized prior service cost $ 63 $ 163 $ 156