Note 11 - Stock-based Compensation - Schedule of Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Total stock-based compensation expense	$ 3,818	$ 3,995	$ 12,622	$ 10,091
Restricted Stock Units (RSUs) [Member]
Total stock-based compensation expense	3,508	3,604	11,642	8,997
Employee Stock Purchase Plan [Member]
Total stock-based compensation expense	$ 310	$ 391	$ 980	$ 1,094