Note J - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2019	Mar. 25, 2018	Mar. 26, 2017	Mar. 27, 2016
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 245
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		31.00%	34.00%	34.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		$ 263	$ 167	$ 208
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total		214	183
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total		31	$ 29	$ 34
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit		$ 3
Scenario, Forecast [Member] \| Minimum [Member]
Effective Income Tax Rate Reconciliation, Percent, Total	27.00%
Scenario, Forecast [Member] \| Maximum [Member]
Effective Income Tax Rate Reconciliation, Percent, Total	30.00%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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