Note E - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 27, 2021	Jun. 28, 2020
Net income, basic calculation	$ 5,763	$ 4,000
Number of shares, basic calculation (in shares)	4,115	4,120
Net income per share, basic calculation (in dollars per share)	$ 1.40	$ 0.97
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	$ 5,763	$ 4,000
Number of shares, diluted calculation (in shares)	4,115	4,120
Net income per share, diluted calculation (in dollars per share)	$ 1.40	$ 0.97