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Note 14 - Segment Information (Details Textual) | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Number of Reportable Segments | 2 |  | 3
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | Non-US [Member] |  |  |
Concentration Risk, Percentage | 6.70% | 7.20% | 7.20%
Assets, Total [Member] | Segment Concentration Risk [Member] | Fruit and Vegetable Segment [Member] |  |  |
Concentration Risk, Percentage |  |  | 99.00%

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