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Note 2 - Revenue - Customer Accounts Receivable (Details) - USD ($)		12 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Trade accounts receivable		$ 4,483,739	$ 4,194,934
Unbilled revenue	[1]	1,294,798	1,240,097
Customer credit balances		1,915,859	1,972,132
Customer deposits		1,488,113	1,476,321
Increase (decrease) in Unbilled revenue	[1]	54,701
Increase (decrease) in Customer credit balances		(56,273)
Increase (decrease) in Customer deposits		11,792
Trade Accounts Receivable [Member]
Trade accounts receivable	[1]	3,080,140	$ 2,782,025
Increase (decrease) in Trade accounts receivable	[1]	$ 298,115
[1] Included in "Accounts receivable, net" in the consolidated balance sheet. Amounts shown net of reserve for bad debts.

X

- Definition

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

No definition available.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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