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Note 2 - Revenue - Customer Accounts Receivable (Details) - USD ($)		12 Months Ended
		Sep. 30, 2023	Sep. 30, 2022
Trade accounts receivable		$ 4,194,934	$ 5,353,270
Unbilled revenue	[1]	1,240,097	1,585,062
Customer credit balances		1,972,132	1,400,770
Customer deposits		1,476,321	1,457,610
Increase (decrease) in Unbilled revenue	[1]	(344,965)
Increase (decrease) in Customer credit balances		571,362
Increase (decrease) in Customer deposits		18,711
Trade Accounts Receivable [Member]
Trade accounts receivable	[1]	2,782,025	$ 3,697,431
Increase (decrease) in Trade accounts receivable	[1]	$ (915,406)
[1] Included in "Accounts receivable, net" in the consolidated balance sheet. Amounts shown net of reserve for bad debts.

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Amount of increase (decrease) of liability for consideration received or receivable from customer which is not included in the transaction price, when considered is expected to be refunded to customer.

+ References

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