Note C - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Net income, basic calculation	$ 13,435	$ 21,493
Number of shares, basic calculation (in shares)	4,216,000	4,187,000
Net income per share, basic calculation (in dollars per share)	$ 3.19	$ 5.13
Effect of dilutive employee stock options (in shares)		33,000
Effect of dilutive employee stock options (in dollars per share)		$ (0.04)
Net income, diluted calculation	$ 13,435	$ 21,493
Number of shares, diluted calculation (in shares)	4,216,000	4,220,000
Net income per share, diluted calculation (in dollars per share)	$ 3.19	$ 5.09