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Note 2 - Revenue Recognition - Segment Revenue Disaggregated by Product Category Groups (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2024
Net sales | [1] | $ 1,659,675 | $ 1,578,887 | $ 1,458,603
Canned Vegetables [Member] |  |  |  |
Net sales |  | 1,366,632 | 1,314,315 | 1,204,823
Frozen [Member] |  |  |  |
Net sales |  | 151,183 | 124,714 | 120,795
Fruit [Member] |  |  |  |
Net sales |  | 93,456 | 92,378 | 87,435
Snack [Member] |  |  |  |
Net sales |  | 15,020 | 14,995 | 13,400
Manufactured Product, Other [Member] |  |  |  |
Net sales |  | $ 33,384 | $ 32,485 | $ 32,150
[1] | Information received by the CODM as part of net sales includes trade promotion costs representing amounts paid to customers for shelf space, to obtain favorable display positions, and to offer temporary price reductions for the sale of the Company's products to consumers.

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