Note 15 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Income Tax Expense (Benefit)	$ 19,000	$ 25,000	$ 49,000	$ 102,000