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Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Apr. 30, 2024
Stock-Based Compensation |
Schedule of stock option plans | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Restated 2006 Plan
​ |  | ​ |  | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Exercise
​ | ​ | Shares | ​ | Price
Outstanding at April 30, 2021 |  | 280,526 | ​ |  | 24.57
Options granted |  | — | ​ |  | —
Options exercised |  | (114,362) | ​ |  | 24.28
Options canceled |  | — | ​ |  | —
Outstanding at April 30, 2022 |  | 166,164 | ​ |  | 24.78
Options granted |  | — | ​ |  | —
Options exercised |  | (100,000) | ​ |  | 22.77
Options canceled |  | — | ​ |  | —
Outstanding at April 30, 2023 |  | 66,164 | ​ |  | 27.82
Options granted |  | — | ​ |  | —
Options exercised |  | — | ​ |  | —
Options canceled |  | — | ​ |  | —
Outstanding at April 30, 2024 |  | 66,164 | ​ |  | 27.82
Options exercisable at April 30, 2024 |  | 66,164 | ​ | $ | 27.82
​
Schedule of information concerning outstanding and exercisable options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Options Outstanding | ​ | ​ | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | ​ | Options Exercisable |
| ​ | ​ | ​ |  | ​ |  | Remaining |  | Weighted |  | ​ |  | Weighted |
​ | ​ | ​ | ​ | ​ | As of | ​ | Contractual | ​ | Average | ​ | As of | ​ | Average |
​ | ​ | ​ | ​ | ​ | April 30, | ​ | Life In | ​ | Exercise | ​ | April 30, | ​ | Exercise |
Range of Exercise Prices | ​ | 2024 | ​ | Years | ​ | Price | ​ | 2024 | ​ | Price |
$ | 26.70 | - | 28.99 |  | 50,000 |  | 1.15 | ​ | $ | 26.70 |  | 50,000 | ​ | $ | 26.70 | ​
​ | 29.00 | - | 31.27 |  | 16,164 |  | 0.25 | ​ |  | 31.27 |  | 16,164 | ​ |  | 31.27 | ​
$ | 26.70 | - | 31.27 |  | 66,164 |  | 0.93 | ​ | $ | 27.82 |  | 66,164 | ​ | $ | 27.82 | ​
​
Schedule of Company's restricted stock awards | Information related to the Company’s restricted stock awards at April 30, 2024 and for the year then ended is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2021 Plan | ​ | Restated 2006 Plan |
​ |  | ​ |  | Weighted | ​ | ​ |  | Weighted |
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average |
​ | ​ | ​ | ​ | Grant Date | ​ | ​ | ​ | Grant Date |
​ | ​ | Shares | ​ | Fair Value | ​ | Shares | ​ | Fair Value |
Unvested stock at April 30, 2023 |  | 95,599 | ​ | $ | 85.90 | ​ | 44,080 | ​ | $ | 99.62 | ​
Stock granted |  | 149,502 | ​ |  | 99.89 | ​ | — | ​ |  | — | ​
Stock vested |  | (43,692) | ​ |  | 64.72 | ​ | (31,910) | ​ |  | 99.92 | ​
Stock canceled |  | (9,802) | ​ |  | 91.03 | ​ | (2,268) | ​ |  | 116.95 | ​
Unvested stock at April 30, 2024 |  | 191,607 | ​ | $ | 101.38 | ​ | 9,902 | ​ | $ | 94.67 | ​
​ Information related to the Company’s restricted stock units at April 30, 2024 and for the year then ended is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Restated 2021 Plan | ​ | Restated 2006 Plan |
​ |  | ​ |  | Weighted |  | ​ |  | Weighted |
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average |
​ | ​ | ​ | ​ | Grant Date | ​ | ​ | ​ | Grant Date |
​ | ​ | Shares | ​ | Fair Value | ​ | Shares | ​ | Fair Value |
Unvested stock at April 30, 2023 |  | 814 | ​ | $ | 85.91 |  | 2,688 | ​ | $ | 97.69 | ​
Stock granted |  | 2,873 | ​ |  | 104.30 |  | — | ​ |  | — | ​
Stock vested |  | (272) | ​ |  | 85.91 |  | (1,339) | ​ |  | 97.69 | ​
Stock canceled |  | — | ​ |  | — |  | — | ​ |  | — | ​
Unvested stock at April 30, 2024 |  | 3,415 | ​ | $ | 101.38 |  | 1,349 | ​ | $ | 97.69 | ​
​

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