Note C - Income Per Share (Details) - Table of Earnings per Share Reconciliation (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jun. 29, 2014	Jun. 30, 2013
Table of Earnings per Share Reconciliation [Abstract]
Basic calculation	$ 4,071	$ 3,354
Basic calculation	4,471,000	4,415,000
Basic calculation	$ 0.91	$ 0.76
Effect of dilutive employee stock options	122,000	173,000
Effect of dilutive employee stock options	$ (0.02)	$ (0.03)
Diluted calculation	$ 4,071	$ 3,354
Diluted calculation	4,593,000	4,588,000
Diluted calculation	$ 0.89	$ 0.73