Note 2 - Revenue Recognition - Segment Revenue Disaggregated by Product Category Groups (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Dec. 31, 2022	Jan. 01, 2022
Net sales	$ 473,254	$ 445,593	$ 1,178,289	$ 1,052,891
Canned Vegetables [Member]
Net sales	392,942	373,205	976,026	860,737
Frozen [Member]
Net sales	33,754	32,305	93,560	95,739
Fruit [Member]
Net sales	33,371	30,192	75,674	68,351
Snack [Member]
Net sales	3,360	2,550	10,035	9,647
Manufactured Product, Other [Member]
Net sales	$ 9,827	$ 7,341	$ 22,994	$ 18,417