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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 |

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