Note L - 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. 31, 2019	Mar. 25, 2018	Mar. 26, 2017
Options outstanding – beginning of year (in shares)			75,745	124,030
Options outstanding – beginning of year (in dollars per share)			$ 35.58	$ 26.29
Granted (in shares)		10,000
Granted (in dollars per share)		$ 89.90
Replacement options issued (A) (in shares)	[1]		68,498
Replacement options issued (A) (in dollars per share)	[1]		$ 33.44
Expired (in shares)
Expired (in dollars per share)
Cancellation of outstanding options (A) (in shares)	[1]		(64,384)
Cancellation of outstanding options (A) (in dollars per share)	[1]		$ 35.58
Exercised (in shares)		(36,264)	(11,361)	(48,285)
Exercised (in dollars per share)		$ 33.438	$ 35.58	$ 11.72
Options outstanding - end of year (in shares)		42,234		75,745
Options outstanding - end of year (in dollars per share)		$ 46.807		$ 35.58
Options exercisable - end of year (in shares)		32,234	48,348	37,873
Options exercisable - end of year (in dollars per share)		$ 33.438	$ 33.438	$ 35.58
Options Outstanding After Replacement Stock Issuance [Member]
Options outstanding – beginning of year (in shares)		68,498
Options outstanding – beginning of year (in dollars per share)		$ 33.438
Options outstanding - end of year (in shares)			68,498
Options outstanding - end of year (in dollars per share)			$ 33.438
Options Outstanding Before Replacement Stock Issuance [Member]
Options outstanding – beginning of year (in shares)		68,498
Options outstanding – beginning of year (in dollars per share)		$ 33.438
Options outstanding - end of year (in shares)			68,498
Options outstanding - end of year (in dollars per share)			$ 33.438

[1] Represents the effects on outstanding options after giving to the replacement options issued in connection with the Company's special dividend to the shareholders of record on December 22, 2017.