Note 17 - Defined Contribution Plan (Details Textual) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	25.00%
Defined Contribution Plan Employer Maximum Discretionary Contribution Amount per Employee	$ 2,500
Defined Contribution Plan, Cost	$ 1,100,000	$ 1,400,000	$ 1,300,000