Note 2 - Basis of Presentation and Significant Accounting Policies (Details Textual) $ in Thousands	Jun. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)
Number of Wholly Owned Subsidiaries	8
Number of Additional Inactive Subsidiaries	2
Cash and Cash Equivalents, at Carrying Value, Total	$ 11,723	$ 13,167	$ 14,540
Restricted Cash, Current	100	279
Restricted Cash, Noncurrent	$ 971	$ 1,082