Note C - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Net income, basic calculation	$ 11,075	$ 13,435
Number of shares, basic calculation (in shares)	4,116,000	4,216,000
Net income per share, basic calculation (in dollars per share)	$ 2.69	$ 3.19
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	$ 11,075	$ 13,435
Number of shares, diluted calculation (in shares)	4,116,000	4,216,000
Net income per share, diluted calculation (in dollars per share)	$ 2.69	$ 3.19