Note 1 - General (Details Textual) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Sep. 23, 2023	Sep. 24, 2022	Sep. 30, 2023	Mar. 25, 2023
Investments	$ 0.2			$ 0.2
Share-Based Payment Arrangement, Expense	2.2	$ 1.9
Realized Gain (Loss), Foreign Currency Transaction, before Tax	0.1	0.1
Unrealized Gain (Loss), Foreign Currency Transaction, before Tax	$ 0.1	$ 0.3
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.50		$ 0.50	$ 0.50
Dilutive Securities, Effect Per Share on Earnings (in dollars per share)	$ 0.01	$ 0.01
Foreign Exchange Contract [Member]
Derivative Asset, Notional Amount	$ 2.1