Note O - Share-based Compensation - Outstanding Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 24, 2023	Mar. 26, 2023
Options outstanding (in shares)	20,000
Options outstanding, weighted average exercise price (in dollars per share)	$ 79.2
Options outstanding, weighted average remaining contractual term (Year)	3 years 7 months 17 days	1 year 11 months 1 day
Options outstanding, aggregate intrinsic value	$ 40
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	10,000
Granted (in dollars per share)	$ 78
Granted (Year)	4 years 7 months 20 days
Expired (in shares)	(10,000)
Expired (in dollars per share)	$ 89.9
Options outstanding (in shares)	20,000	20,000
Options outstanding, weighted average exercise price (in dollars per share)	$ 73.25	$ 79.2
Options outstanding, aggregate intrinsic value	$ 88	$ 40
Options exercisable (in shares)	5,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 68.5
Options exercisable, weighted average remaining contractual term (Year)	2 years 7 months 17 days
Options exercisable, aggregate intrinsic value	$ 44
Share-Based Payment Arrangement, Option [Member]
Weighted average option fair values (in dollars per share)	$ 16.23
Expected life (years) (Year)	4 years 4 months 24 days
Interest rate	4.31%
Volatility	24.29%
Dividend yield	2.56%