Note D - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 25, 2022	Sep. 26, 2021	Sep. 25, 2022	Sep. 26, 2021
Net income, basic calculation	$ 5,958	$ 3,545	$ 13,095	$ 9,308
Number of shares, basic calculation (in shares)	4,083	4,115	4,098	4,115
Net income per share, basic calculation (in dollars per share)	$ 1.46	$ 0.86	$ 3.20	$ 2.26
Effect of dilutive employee stock options (in shares)	0	0	0	0
Effect of dilutive employee stock options (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Net income, diluted calculation	$ 5,958	$ 3,545	$ 13,095	$ 9,308
Number of shares, diluted calculation (in shares)	4,083	4,115	4,098	4,115
Net income per share, diluted calculation (in dollars per share)	$ 1.46	$ 0.86	$ 3.20	$ 2.26