Note 7 - Accumulated Other Comprehensive Loss - Schedule of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Balance	$ 134,624	$ 132,716
Other comprehensive income	(281)	13,567
Balance	125,509	134,624
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	56	(11)
Other comprehensive income	(57)	67
Balance	(1)	56
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(4,313)	(17,813)
Other comprehensive income	(224)	13,500
Balance	(4,537)	(4,313)
AOCI Attributable to Parent [Member]
Balance	(4,257)	(17,824)
Other comprehensive income	(281)	13,567
Balance	$ (4,538)	$ (4,257)