Note K - Income Taxes (Details Textual) - USD ($)	3 Months Ended
	Jun. 30, 2019	Jun. 24, 2018
Effective Income Tax Rate Reconciliation, Percent, Total	25.30%	26.40%
Effective Income Tax Rate, Effect of Stock Compensation	3.20%	1.00%
Share-based Payment Arrangement, Expense, Tax Benefit	$ 228,000	$ 63,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	28.50%	27.40%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 269,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	$ 257,000