Note M - Income Taxes (Details Textual) - USD ($)	3 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Effective Income Tax Rate Reconciliation, Percent, Total	28.10%	25.30%
Effective Income Tax Rate, Effect of Stock Compensation		3.20%
Share-based Payment Arrangement, Expense, Tax Benefit		$ 228,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		28.50%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 321,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 274,000