Note 3 - Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Mutual fund investments, cost	$ 11	$ 10
Mutual fund investments, gains	1	1
Mutual fund investments, losses	0	0
Mutual fund investments, total	12	11
Mutual Fund Investment [Member]
Mutual fund investments, cost	11	10
Mutual fund investments, gains	1	1
Mutual fund investments, losses	0	0
Mutual fund investments, total	$ 12	$ 11