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Note 6 - Fair Value Measurements - Fair Value of Earnout Liabilities (Details) - Earnout Payment [Member] - Enercon Technologies, Ltd [Member] - USD ($) $ in Thousands | Dec. 31, 2024 | Nov. 14, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Business Combination, Contingent Consideration, Liability |  | $ 3,300 |
Fair Value, Inputs, Level 3 [Member] |  |  |
Earnout payment liability - 2025 | $ 2,041 |  | $ 0
Earnout payment liability - 2026 | 1,446 |  | 0
Business Combination, Contingent Consideration, Liability | $ 3,487 |  | $ 0

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