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Note 13 - Segment Information (Details Textual) | 12 Months Ended
--- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2024
Number of Reportable Segments | 2 |  |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer A [Member] |  |  |
Concentration Risk, Percentage | 17.00% | 16.00% | 14.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer B [Member] |  |  |
Concentration Risk, Percentage | 11.00% |  |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer A [Member] |  |  |
Concentration Risk, Percentage | 25.00% | 24.00% |

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