Note 5 - Employee Benefit Plan  | 
12 Months Ended | 
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Sep. 30, 2021  | |
| Notes to Financial Statements | |
| Retirement Benefits [Text Block] | 
    NOTE 5 – EMPLOYEE BENEFIT PLAN 
 The Company maintains a contributory 401(k) profit sharing benefit plan, whereby eligible employees may contribute a portion of their earnings, not to exceed annual amounts allowed under the Internal Revenue Code. The Company matched 100% of the first 3% and 50% of the next 3% of the participant’s eligible compensation that was contributed by the participant. The Company’s contributions under this plan were $914,942 and $838,946 for the years ended September 30, 2021 and 2020, respectively.  | 
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- References No definition available. 
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- Definition The entire disclosure for retirement benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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