Note 6 - Accumulated Other Comprehensive Loss - Schedule of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Balance	$ 132,716	$ 121,647
Other comprehensive income (loss)	13,567	(2,511)
Balance	134,624	132,716
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(11)	(15)
Other comprehensive income (loss)	67	4
Balance	56	(11)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(17,813)	(15,298)
Other comprehensive income (loss)	13,500	(2,515)
Balance	(4,313)	(17,813)
AOCI Attributable to Parent [Member]
Balance	(17,824)	(15,313)
Other comprehensive income (loss)	13,567	(2,511)
Balance	$ (4,257)	$ (17,824)