Note E - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 26, 2021	Dec. 27, 2020
Net income, basic calculation	$ 2,130	$ 1,359	$ 11,438	$ 9,014
Number of shares, basic calculation (in shares)	4,115	4,115	4,115	4,117
Net income per share, basic calculation (in dollars per share)	$ 0.52	$ 0.33	$ 2.78	$ 2.19
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	$ 2,130	$ 1,359	$ 11,438	$ 9,014
Number of shares, diluted calculation (in shares)	4,115	4,115	4,115	4,117
Net income per share, diluted calculation (in dollars per share)	$ 0.52	$ 0.33	$ 2.78	$ 2.19