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Equity Compensation Plans and Other Incentive Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
May 31, 2025 | May 31, 2024 | May 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Number of shares available for grant | 13,817,754 | 16,778,458 | 2,871,000
Options Exercisable, Weighted Average Exercise Price | $ 19.63 | $ 26.11 | $ 31.54
Compensation expense related to share based awards | $ 17,291 | $ 13,768 | $ 10,177
Remaining compensation cost to be expensed in future periods for non-vested options | $ 13,488 |  |
Weighted average expense recognition period | 1 year 9 months 18 days |  |
Weighted average grant date fair value | $ 15.49 | $ 15.55 | $ 13.83
Number of shares purchased by employees | 157,648 | 134,810 | 94,604
Defined contribution 401(K) benefit expense | $ 3,726 | $ 3,368 | $ 2,439
Accrued Bonus | $ 1,828 | 8,056 |
First 3% employees deferred amount |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Defined contribution plan employer matching contribution | 100.00% |  |
Next 2% employees deferred amount |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Defined contribution plan employer matching contribution | 50.00% |  |
Restricted Stock Units (RSUs) |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Weighted average expense recognition period | 1 year 9 months 18 days |  |
Restricted stock units vested- fair value | $ 5,208 | $ 3,835 | $ 820
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | $ 11,187 |  |
Employee Stock Purchase Plan | 2011 Employee Stock Purchase Plan |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Number of shares available for grant | 588,865 |  |
Number of shares authorized for grant | 1,000,000 |  |
Annual maximum limit percentage of compensation to purchase shares | 5.00% |  |
Employee stock purchase plan stock price percentage | 10.00% |  |
Minimum |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Stock option vesting period | 3 years |  |
Stock option contractual terms | 5 years |  |
Minimum | 2018 Omnibus Incentive Plan | Restricted Stock Units (RSUs) |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Stock option vesting period | 3 years |  |
Average |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Stock option contractual terms | 7 years |  |
Maximum |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Stock option vesting period | 5 years |  |
Stock option contractual terms | 10 years |  |
Maximum | 2018 Omnibus Incentive Plan | Restricted Stock Units (RSUs) |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Stock option vesting period | 5 years |  |

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