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. 29, 2020	Mar. 31, 2019
Options outstanding – beginning of year (in shares)	42,234	68,498
Options outstanding – beginning of year (in dollars per share)	$ 46.807	$ 33.438
Granted (in shares)		10,000
Granted (in dollars per share)		$ 89.90
Expired (in shares)
Expired (in dollars per share)
Exercised (in shares)	(32,234)	(36,264)
Exercised (in dollars per share)	$ 33.438	$ 33.438
Options outstanding - end of year (in shares)	10,000	42,234
Options outstanding - end of year (in dollars per share)	$ 89.90	$ 46.807
Options exercisable (in shares)	3,333	32,234
Options exercisable, weighted average exercise price (in dollars per share)	$ 89.90	$ 33.438