Note O - Share-based Compensation - Outstanding Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Sep. 27, 2020	Mar. 29, 2020	Mar. 31, 2019
Options outstanding (in shares)	10,000
Options outstanding, weighted average exercise price (in dollars per share)	$ 89.90
Options outstanding, weighted average remaining contractual life (Year)	2 years 11 months 15 days	3 years 5 months 12 days
Options granted (in shares)	0		10,000
Granted, weighted average exercise price (in dollars per share)	$ 0		$ 89.90
Options exercised (in shares)	0
Exercised, weighted average exercise price (in dollars per share)	$ 0
Exercised, aggregate intrinsic value	$ 0
Options outstanding (in shares)	10,000	10,000
Options outstanding, weighted average exercise price (in dollars per share)	$ 89.90	$ 89.90
Options outstanding, aggregate intrinsic value	$ 0
Options exercisable (in shares)	6,667
Options exercisable, weighted average exercise price (in dollars per share)	$ 89.90
Options exercisable, weighted average remaining contractual life (Year)	2 years 11 months 15 days
Options exercisable, aggregate intrinsic value	$ 0