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Employee Benefit Plans (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Apr. 30, 2025 | Apr. 30, 2024 | Oct. 11, 2024
Employee Benefit Plans (Details) [Line Items] |  |  |
Stock Issued During Period, Value, Employee Benefit Plan | $ 901,000 | $ 514,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in Shares) | 20,000 | 0 |
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued (in Shares) | 15,444 |  |
Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture (in Shares) | 1,550 | 3,300 |
Employee Benefits and Share-Based Compensation | $ 1,399,000 | $ 756,000 |
Share-Based Payment Arrangement, Noncash Expense | 1,161,000 | 822,000 |
Unrecognized stock compensation | 4,200,000 | 2,900,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | 918,000 | 521,000 |
Assets, Fair Value Disclosure | $ 7,000,000 | $ 6,600,000 |
Common Stock [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Stock Issued During Period, Shares, Employee Benefit Plan (in Shares) | 70,100 | 58,987 |
Stock Issued During Period, Value, Employee Benefit Plan | $ 70,000 | $ 59,000 |
United States Post-Retirement Benefit Plan of US Entity, Defined Benefit [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Stock Issued During Period, Shares, Employee Benefit Plan (in Shares) | 70,100 | 58,987 |
Stock Issued During Period, Value, Employee Benefit Plan | $ 901,000 | $ 514,000 |
APIC, Share-Based Payment Arrangement, ESPP, Increase for Cost Recognition | $ 831,000 | $ 455,000 |
Common Stock, Capital Shares Reserved for Future Issuance (in Shares) | 504,734 | 495,395 |
Income Incentive Pool [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Accrued Bonuses | $ 1,800,000 | $ 489,000 |
Deferred Compensation Agreement [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Description | Under these agreements, each key employee receives specified retirement payments for the remainder of the employee’s life with a minimum payment of ten years’ benefits to either the employee or his or her beneficiaries. The agreements also provide for lump sum payments upon termination of employment without cause and reduced benefits upon early retirement. |  |
Deferred Compensation Arrangement with Individual, Compensation Expense | $ 504,000 | 219,000 |
2025 Plan [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in Shares) |  |  | 700,000
Share-Based Payment Arrangement, Option [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period | 4 years |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period | 10 years |  |
Employee Benefits and Share-Based Compensation | $ 357,000 | 487,000 |
Stock Appreciation Rights (SARs) [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period | 5 years |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in Shares) | 20,000 |  |
Stock Appreciation Rights (SARs) [Member] | Common Stock [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in Shares) | 4,556 |  |
Stock Appreciation Rights (SARs) [Member] | Employees and Directors [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Total Grants from Inception, Gross (in Shares) | 2,385,000 |  |
Restricted Stock Units (RSUs) [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Share-Based Payment Arrangement, Noncash Expense | $ 776,000 | 301,000 |
Performance Shares [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period | 4 years |  |
UNITED STATES | Fair Value, Inputs, Level 1 [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Assets, Fair Value Disclosure | $ 3,500,000 | 2,800,000 |
UNITED STATES | Fair Value, Inputs, Level 2 [Member] |  |  |
Employee Benefit Plans (Details) [Line Items] |  |  |
Assets, Fair Value Disclosure | $ 400,000 | $ 900,000 |

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