Note E - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Net income, basic calculation	$ 3,655	$ 3,658	$ 7,655	$ 9,027
Number of shares, basic calculation (in shares)	4,115	4,227	4,118	4,216
Net income per share, basic calculation (in dollars per share)	$ 0.89	$ 0.87	$ 1.86	$ 2.14
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	$ 3,655	$ 3,658	$ 7,655	$ 9,027
Number of shares, diluted calculation (in shares)	4,115	4,227	4,118	4,216
Net income per share, diluted calculation (in dollars per share)	$ 0.89	$ 0.87	$ 1.86	$ 2.14