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Note 2 - Revenue - Customer Accounts Receivable (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Sep. 30, 2023
Trade accounts receivable |  | $ 9,451,708 | $ 4,194,934
Unbilled revenue |  | 2,850,532 | 1,240,097
Customer credit balances |  | 947,563 | 1,972,132
Customer deposits |  | 1,697,018 | 1,476,321
Increase (decrease) in Unbilled revenue | [1] | 1,610,435 |
Increase (decrease) in Customer credit balances |  | (1,024,569) |
Increase (decrease) in Customer deposits |  | 220,697 |
Trade Accounts Receivable [Member] |  |  |
Trade accounts receivable |  | 6,485,713 | $ 2,782,025
Increase (decrease) in Trade accounts receivable | [1] | $ 3,703,688 |
[1] | Included in accounts receivable in the condensed consolidated balance sheet. Amounts shown net of reserve for credit losses.

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