Note I - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Effective Income Tax Rate Reconciliation, Percent, Total	25.40%	26.90%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 99
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability, Percent		0.30%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 311	$ 253
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	259	245
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	32	$ 31
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 16