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. 27, 2020	Dec. 29, 2019	Dec. 27, 2020	Dec. 29, 2019
Net income, basic calculation	$ 1,359	$ 1,213	$ 9,014	$ 10,240
Number of shares, basic calculation (in shares)	4,115	4,225	4,117	4,219
Net income per share, basic calculation (in dollars per share)	$ 0.33	$ 0.29	$ 2.19	$ 2.43
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	$ 1,359	$ 1,213	$ 9,014	$ 10,240
Number of shares, diluted calculation (in shares)	4,115	4,225	4,117	4,219
Net income per share, diluted calculation (in dollars per share)	$ 0.33	$ 0.29	$ 2.19	$ 2.43