Note 19 - Major Customers, Suppliers and Related Information (Details Textual) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Revenue from Contract with Customer, Including Assessed Tax	$ 14,152	$ 12,627	$ 37,997	$ 31,956
UNITED STATES
Revenue from Contract with Customer, Including Assessed Tax	$ 12,631	$ 10,564	$ 31,465	$ 24,401
Revenue Benchmark [Member] \| Customer Concentration Risk [Member]
Number Of Major Customers	1	1	1	1
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| One Customer [Member]
Concentration Risk, Percentage	77.00%	62.00%	70.00%	54.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Number Of Major Customers			2	2
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| One Customer [Member]
Concentration Risk, Percentage			61.00%	51.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Two Customers [Member]
Concentration Risk, Percentage			19.00%	17.00%

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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+ Details