Note 3 - Stock-based Compensation - Summary of Options (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Sep. 24, 2022 USD ($) $ / shares shares
Outstanding, number of options (in shares) | shares	165
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 53.27
Granted, number of options (in shares) | shares	56
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 62.46
Exercised, number of options (in shares) | shares	(4)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 6.19
Forfeited, number of options (in shares) | shares	0
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Outstanding, number of options (in shares) | shares	217
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 56.25
Outstanding, weighted average remaining contractual term (Year)	7 years
Outstanding, aggregate intrinsic value | $	$ 2,546
Exercisable, number of options (in shares) | shares	26
Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 55.87
Exercisable, weighted average remaining contractual term (Year)	9 years
Exercisable, aggregate intrinsic value | $	$ 315