Note 3 - Revenue Recognition - Segment Revenue Disaggregated by Product Category Groups (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 01, 2022	Dec. 26, 2020	Jan. 01, 2022	Dec. 26, 2020
Net sales	$ 445,593	$ 484,392	$ 1,052,891	$ 1,162,851
Canned Vegetables [Member]
Net sales	373,205	394,492	860,737	917,801
Frozen [Member]
Net sales	32,305	27,281	95,739	76,137
Fruit [Member]
Net sales	30,192	30,722	68,351	73,536
Snack [Member]
Net sales	2,550	2,778	9,647	8,194
Prepared Foods [Member]
Net sales	0	23,496	0	71,866
Manufactured Product, Other [Member]
Net sales	$ 7,341	$ 5,623	$ 18,417	$ 15,317