Note 8 - Employee Benefit Plan (Details Textual) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 1,110,000 | $ 1,087,000 | $ 1,017,000 |
| First Level of Matching [Member] | |||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 100.00% | ||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 3.00% | ||
| Second Level Of Matching [Member] | |||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 50.00% | ||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 3.00% | ||
| X | ||||||||||
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available.
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| X | ||||||||||
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available.
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| X | ||||||||||
- Definition Percentage employer matches of the employee's percentage contribution matched. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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