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Note 7 - Stockholders' Equity (Tables) | 3 Months Ended
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Jun. 30, 2025
Notes Tables |
Share-Based Payment Arrangement, Activity [Table Text Block] |
|  | Time-Based Restricted Stock Units |  |  | Performance-Based Restricted Stock Units |
|  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value per Share |  |  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value per Share |
Outstanding as of March 31, 2025 |  |  | 145 |  |  | $ | 106.54 |  |  |  | 85 |  |  | $ | 166.31 |
Awards granted(1) |  |  | 90 |  |  |  | 95.31 |  |  |  | 44 |  |  |  | 99.56 |
Awards forfeited |  |  | (2 | ) |  |  | 104.02 |  |  |  | - |  |  |  | - |
Awards distributed |  |  | (53 | ) |  |  | 114.67 |  |  |  | (4 | ) |  |  | 174.73 |
Outstanding as of June 30, 2025 |  |  | 180 |  |  | $ | 98.57 |  |  |  | 125 |  |  | $ | 142.39 |

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