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Note 1 - Summary of Significant Accounting Policies - Maturity Date of CDs (Details) - USD ($) | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Less than one year | $ 10,373,831 | $ 10,582,527
1-5 years | 36,912,777 | 25,143,000
Total | $ 47,286,608 | $ 35,725,527

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