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Note 2 - Revenue - Customer Accounts Receivable (Details) - USD ($)		3 Months Ended
		Dec. 31, 2021	Sep. 30, 2021
Trade accounts receivable		$ 11,846,579	$ 4,949,900
Unbilled revenue	[1]	3,476,497	1,191,227
Customer credit balances		1,387,836	1,539,680
Customer deposits		1,611,093	1,571,342
Increase (decrease) in Unbilled revenue	[1]	2,285,270
Increase (decrease) in Customer credit balances		(151,844)
Increase (decrease) in Customer deposits		39,751
Trade Accounts Receivable [Member]
Trade accounts receivable	[1]	8,237,566	$ 3,722,916
Increase (decrease) in Trade accounts receivable	[1]	$ 4,514,650
[1] Included in accounts receivable in the condensed consolidated balance sheet. Amounts shown net of reserve for bad debts.

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