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Note 14 - Domestic and Foreign Revenues - Schedule of Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Net sales | $ 491 | $ 531 | $ 989 | $ 923
UNITED KINGDOM |  |  |  |
Net sales | 72 | 11 | 104 | 11
SPAIN |  |  |  |
Net sales | 0 | 56 | 100 | 104
AUSTRALIA |  |  |  |
Net sales | 12 | 87 | 42 | 87
NORWAY |  |  |  |
Net sales | 0 | 0 | 34 | 0
ARGENTINA |  |  |  |
Net sales | 12 | 0 | 12 | 0
INDIA |  |  |  |
Net sales | 7 | 15 | 7 | 99
ROMANIA |  |  |  |
Net sales | 0 | 0 | 0 | 94
All Other Foreign Countries [Member] |  |  |  |
Net sales | 4 | 37 | 58 | 48
Non-US [Member] |  |  |  |
Net sales | 107 | 184 | 357 | 443
UNITED STATES |  |  |  |
Net sales | $ 384 | $ 347 | $ 632 | $ 480

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