Note 2 - Revenue Recognition - Segment Revenue Disaggregated by Product Category Groups (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Net sales	$ 407,475	$ 439,842	$ 706,139	$ 705,035
Canned Vegetables [Member]
Net sales	328,586	364,749	579,536	583,084
Frozen [Member]
Net sales	43,046	40,095	64,585	59,806
Fruit [Member]
Net sales	22,801	23,971	39,539	42,303
Snack [Member]
Net sales	4,256	3,695	7,354	6,675
Manufactured Product, Other [Member]
Net sales	$ 8,786	$ 7,332	$ 15,125	$ 13,167