Note 5 - Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Sep. 30, 2023

Notes Tables

Comprehensive Income (Loss) [Table Text Block]

	Unrealized Losses on Available-for-Sale Securities			Foreign Currency Translation Adjustments			Total
Balance at October 1, 2021	$	(15	)	$	(16,305	)	$	(16,320	)
Other comprehensive income		—			1,007			1,007
Balance at September 30, 2022	$	(15	)		(15,298	)		(15,313	)
Other comprehensive income (loss)		4			(2,515	)		(2,511	)
Balance at September 30, 2023	$	(11	)	$	(17,813	)	$	(17,824	)