Note 12 - Leases - Initial Measurement of Operating Lease (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Operating lease ROU assets as of September 30, 2022	$ 3,886
Operating lease liabilities as of September 30, 2022	5,291
Additional operating lease ROU assets	0
Less amortization of operating lease ROU assets	(192)	$ (199)
Less lease principal payments on operating lease liabilities	(248)
Effect of exchange rate on operating lease ROU assets	18
Effect of exchange rate on operating lease liabilities	18
Operating lease ROU assets as of March 31, 2023	3,712
Operating lease liabilities as of March 31, 2023	5,061
Less non-current portion	(4,030)		$ (4,283)
Operating lease liabilities, current portion	$ 1,031		$ 1,008