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Note 5 - Cash, Cash Equivalents and Restricted Cash (Tables) | 6 Months Ended
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Jun. 30, 2023
Notes Tables |
Schedule of Cash and Cash Equivalents [Table Text Block] |
|  | June 30, |  |  | December 31, |
​ |  | 2023 |  |  | 2022 |
Cash and cash equivalents |  | $ | 21,578 |  |  | $ | 24,685 |
Restricted cash |  |  | 7,034 |  |  |  | 10,902 |
Total cash, cash equivalents and restricted cash shown in the statement of cash flows |  | $ | 28,612 |  |  | $ | 35,587 |

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