Note I - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 25, 2018	Mar. 26, 2017
Effective Income Tax Rate Reconciliation, Percent, Total	26.90%	36.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 99	$ 245
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability, Percent	0.30%	6.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	31.00%	34.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 253	$ 263	$ 167
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	245	214
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	31	$ 31	$ 29
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 11