Note M - Stockholders' Equity, Stock Plans and Other Employee Benefit Plans - A Summary of the Status of the Company's Stock Options (Details) - $ / shares	12 Months Ended
	Mar. 26, 2017	Mar. 27, 2016	Mar. 29, 2015
Options outstanding – beginning of year (in shares)		142,964	279,500
Options outstanding – beginning of year (in dollars per share)		$ 24.36	$ 15.22
Options outstanding - end of year (in dollars per share)	$ 35.58		24.36
Options exercisable - end of year (in dollars per share)	$ 35.58	$ 18.44
Options exercisable - end of year (in shares)	37,873	67,221
Granted (in shares)			50,000
Granted (in dollars per share)			$ 53.89
Expired (in shares)		(3,787)
Expired (in dollars per share)		$ 11.72
Exercised (in shares)	(48,285)	(15,147)	(235,125)
Exercised (in dollars per share)	$ 11.72	$ 11.72	$ 14.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			50,000
Weighted-average fair value of options granted (in dollars per share)			$ 11.97
Options outstanding - end of year (in shares)	75,745		142,964
Options Outstanding After Replacement Stock Issuance [Member]
Options outstanding – beginning of year (in shares)	124,030
Options outstanding – beginning of year (in dollars per share)	$ 26.29
Options outstanding - end of year (in dollars per share)		$ 26.29
Options outstanding - end of year (in shares)		124,030
Options Outstanding Before Replacement Stock Issuance [Member]
Options outstanding – beginning of year (in shares)	124,030
Options outstanding – beginning of year (in dollars per share)	$ 26.29
Options outstanding - end of year (in dollars per share)		$ 26.29
Options outstanding - end of year (in shares)		124,030