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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