Note 2 - Basis of Presentation and Significant Accounting Policies (Details Textual) $ in Thousands	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Number of Wholly Owned Subsidiaries	9
Number of Additional Inactive Subsidiaries	2
Cash and Cash Equivalents, at Carrying Value, Total	$ 4,780	$ 8,665	$ 7,563
Restricted Cash	346	854
Accounts Receivable, Allowance for Credit Loss	$ 65	$ 65