Note 4 - Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents, and Restricted Cash By Country (Details) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Cash and cash equivalents | $ 2,682 | $ 6,869 |
| Restricted cash | 934 | 1,085 |
| Total cash and cash equivalents, and restricted cash | 3,616 | 7,954 |
| UNITED STATES | ||
| Cash and cash equivalents | 631 | 5,307 |
| MALTA | ||
| Cash and cash equivalents | 663 | 607 |
| Restricted cash | 353 | 566 |
| FINLAND | ||
| Cash and cash equivalents | 875 | 431 |
| UNITED KINGDOM | ||
| Cash and cash equivalents | 157 | 57 |
| Restricted cash | 244 | 164 |
| SWITZERLAND | ||
| Cash and cash equivalents | 106 | 81 |
| LITHUANIA | ||
| Cash and cash equivalents | 99 | 313 |
| CYPRUS | ||
| Cash and cash equivalents | 76 | 14 |
| Restricted cash | 29 | 188 |
| Other [Member] | ||
| Cash and cash equivalents | 75 | 59 |
| Restricted cash | 16 | 7 |
| DENMARK | ||
| Restricted cash | $ 292 | $ 160 |