Note L - Stockholders' Equity, Stock Plans and Other Employee Benefit Plans - A Summary of the Status of the Company's Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 26, 2023	Mar. 27, 2022	Mar. 28, 2021
Options, shares (in shares)	20,000	10,000
Options, weighted average exercise price (in dollars per share)	$ 79.20	$ 89.90
Options outstanding – beginning of year, weighted average remaining contractual life (Year)	1 year 11 months 1 day	2 years 11 months 1 day	2 years 5 months 15 days
Granted, shares (in shares)	0	10,000
Granted, weighted average exercise price (in dollars per share)	$ 0	$ 68.50
Expired, shares (in shares)	0	0
Granted, weighted average remaining contractual life (Year)		4 years 4 months 13 days
Expired, weighted average exercise price (in dollars per share)	$ 0	$ 0
Exercised, shares (in shares)	0	0
Exercised, weighted average exercise price (in dollars per share)	$ 0	$ 0
Options, shares (in shares)	20,000	20,000	10,000
Options, weighted average exercise price (in dollars per share)	$ 79.20	$ 79.20	$ 89.90
Options outstanding - aggregate intrinsic value	$ 40	$ 0
Options exercisable, shares (in shares)	12,500	10,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 85.62	$ 89.90
Options exercisable - weighted average remaining contractual life (Year)	1 year 18 days	1 year 5 months 15 days
Options exercisable - aggregate intrinsic value	$ 10	$ 0