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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Disclosure [Line Items]      
Net change in the total valuation allowance $ 800    
Received amount of Chemomab Therapeutics Inc 351    
Expects to receive amount of Chemomab Therapeutics Inc   $ 183  
Income tax benefit 0 0 $ (534)
Deferred tax asset capital closs carryforward $ 14,224    
Israel [Member]      
Income Tax Disclosure [Line Items]      
Corporate tax rate 23.00%    
Capital losses carryforwards $ 176,000 $ 165,000 $ 159,000
U.S. [Member] | Federal [Member]      
Income Tax Disclosure [Line Items]      
Corporate tax rate 21.00%