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Note 15 - Revenue - Revenues (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Deferred revenue | $ 13 | $ 0
Increases due to consideration received from customers | 283 | 0
Revenue recognized | 222 | 0
Deferred revenue | 326 | 0
Evoke Neuroscience, Inc. [Member] |  |
Acquired in Evoke business combination | $ 252 | $ 0

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