Note E - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 24, 2018
Net income, basic calculation	$ 5,369	$ 4,795
Number of shares, basic calculation (in shares)	4,206	4,185
Net income per share, basic calculation (in dollars per share)	$ 1.28	$ 1.15
Effect of dilutive employee stock options (in shares)		41
Effect of dilutive employee stock options (in dollars per share)		$ (0.02)
Net income, diluted calculation	$ 5,369	$ 4,795
Number of shares, diluted calculation (in shares)	4,206	4,226
Net income per share, diluted calculation (in dollars per share)	$ 1.28	$ 1.13