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Note 11 - Stock Plans (Tables) | 6 Months Ended
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Sep. 30, 2025
Notes Tables |
Class of Treasury Stock [Table Text Block] |
|  | Three Months Ended September 30, |
|  | 2025 |  |  | 2024 |
|  | Number of Shares |  |  | Amount |  |  | Number of Shares |  |  | Amount |
Treasury shares at the beginning of period |  |  | 6,008 |  |  | $ | (82,321 | ) |  |  | 5,368 |  |  | $ | (76,794 | )
Treasury shares purchased |  |  | - |  |  |  | - |  |  |  | 652 |  |  |  | (5,629 | )
Treasury shares reissued |  |  | (47 | ) |  |  | 394 |  |  |  | - |  |  |  | - |
Treasury shares at the end of period |  |  | 5,961 |  |  | $ | (81,927 | ) |  | $ | 6,020 |  |  | $ | (82,423 | )
|  | Six Months Ended September 30, |
|  | 2025 |  |  | 2024 |
|  | Number of Shares |  |  | Amount |  |  | Number of Shares |  |  | Amount |
Treasury shares at the beginning of period |  |  | 6,020 |  |  | $ | (82,423 | ) |  |  | 5,368 |  |  | $ | (76,794 | )
Treasury shares purchased |  |  | - |  |  |  | - |  |  |  | 652 |  |  |  | (5,629 | )
Treasury shares reissued |  |  | (59 | ) |  |  | 496 |  |  |  | - |  |  |  | - |
Treasury shares at the end of period |  |  | 5,961 |  |  | $ | (81,927 | ) |  | $ | 6,020 |  |  | $ | (82,423 | )

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