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Note 12 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 20, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Revenue from Contract with Customer, Including Assessed Tax |  | $ 299 | $ 10 | $ 342 | $ 22 |  |
Contract with Customer, Liability |  | $ 326 | $ 0 | 326 | $ 0 | $ 13 | $ 0
Purchase Agreement [Member] |  |  |  |  |  |  |
Equity Line of Credit Agreement, Maximum Shares Purchasable, Value | $ 10,000 |  |  |  |  |  |
Equity Line of Credit Agreement, Advance Notice, Percentage of Daily Value Traded Common Stock | 40.00% |  |  |  |  |  |
Equity Line of Credit Agreement, Advance Notice, Amount | $ 2,000 |  |  |  |  |  |
Equity Line of Credit Agreement, Purchase Price, Percentage of Daily VWAP | 88.00% |  |  |  |  |  |
Equity Line of Credit Agreement, Commitment Fee | $ 300 |  |  |  |  |  |
Equity Line of Credit, Deferred Offering Costs | $ 36 |  |  |  |  |  |
Equity Line of Credit Agreement, Percentage Threshold of Outstanding Common Stock to Issue Shares | 9.99% |  |  |  |  |  |
Israeli Innovation Authority (“IIA”) [Member] | Grant [Member] |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  | $ 0 |  | 0 |
Israeli Innovation Authority (“IIA”) [Member] | Royalty [Member] |  |  |  |  |  |  |
Research Agreement, Royalty Percentage |  | 3.00% |  | 3.00% |  |  |
Contract with Customer, Liability |  | $ 0 |  | $ 0 |  | 0 |
Contract With Customer, Contingent Liability |  | $ 5,782 |  | $ 5,782 |  | $ 5,833 |

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