Note D - Income Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Basic	$ 2,507	$ 2,847	$ 6,057	$ 5,157
Basic (in shares)	4,172,000	4,432,000	4,169,000	4,508,000
Basic (in dollars per share)	$ 0.60	$ 0.64	$ 1.45	$ 1.14
Effect of dilutive employee stock options (in shares)	35,000	17,000	30,000	27,000
Diluted	$ 2,507	$ 2,847	$ 6,057	$ 5,157
Diluted (in shares)	4,207,000	4,449,000	4,199,000	4,535,000
Diluted (in dollars per share)	$ 0.60	$ 0.64	$ 1.44	$ 1.14
Effect of dilutive employee stock options (in dollars per share)			$ (0.01)