Note D - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 26, 2022	Jun. 27, 2021
Net income, basic calculation	$ 7,137	$ 5,763
Number of shares, basic calculation (in shares)	4,113	4,115
Net income per share, basic calculation (in dollars per share)	$ 1.74	$ 1.40
Effect of dilutive employee stock options (in shares)	0	0
Effect of dilutive employee stock options (in dollars per share)	$ 0	$ 0
Net income, diluted calculation	$ 7,137	$ 5,763
Number of shares, diluted calculation (in shares)	4,113	4,115
Net income per share, diluted calculation (in dollars per share)	$ 1.74	$ 1.40