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Income Taxes (Schedule of Reconciliation of Theoretical Income Tax Expense to Actual Income Tax Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amount      
Statutory tax rate $ (8,995) $ (13,945) $ (24,221)
Nontaxable income or nondeductible expenses:      
Share-based compensation 120    
Other 5    
Foreign tax effects (9)    
Change in temporary differences for which deferred taxes were not recognized   858 (1,177)
Tax rate differential   9 10
Non-deductible expenses   148 346
Change in valuation allowance 2,297    
Other (344)    
Losses and other items for which a valuation allowance was provided or benefit from loss carryforwards   2,192 6,392
Income Tax Expense (Benefit) $ 0 0 0
Nontaxable income or nondeductible expenses, Percent:      
Share-based compensation (1.30%)    
Other (0.10%)    
Foreign tax effects 0.10%    
Change in valuation allowance (25.50%)    
Other 3.80%    
Income tax expense (benefit) 0.00%    
Israeli entities [Member]      
Amount      
Statutory tax rate $ (2,069) (13,945) (24,221)
Nontaxable income or nondeductible expenses:      
Theoretical tax benefit   $ (3,207) $ (5,571)
Percent      
Statutory tax rate 23.00% 23.00% 23.00%