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. 25, 2023	Mar. 26, 2022	Mar. 27, 2021
Service cost	$ 17	$ 96	$ 84
Interest cost	45	52	48
Amortization of prior service cost	1	1	1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	63	149	133
Amortization of prior service cost	(1)	(1)	(1)
Prior service cost	193	0	0
Net actuarial (gain) loss	(185)	(583)	233
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	7	(584)	232
Total recognized in net periodic benefit cost and other comprehensive income	70	(435)	365
Unrecognized prior service cost	$ 163	$ 156	$ 739

Amount recognized in net periodic benefit cost (credit) and other comprehensive (income) loss.

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Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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- Definition

Amount, after tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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