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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Cash and Cash Equivalents [Table Text Block] |
Cash, Cash Equivalents and Restricted Cash |  | December 31, 2023 |  |  | December 31, 2022 |
(in thousands) |  |  |  |  |  |  |  |
Cash and Cash Equivalents |  | $ | 4,502 |  |  | $ | 9,997 |
Restricted Cash |  |  | - |  |  |  | 1,288 |
Long-Term Restricted Cash |  |  | 134 |  |  |  | 2,497 |
Cash, Cash Equivalents and Restricted Cash in the Consolidated Statement of Cash Flows |  | $ | 4,636 |  |  | $ | 13,782 |

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