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Fair Value of Financial Assets and Liabilities (Schedule of Financial Assets and Liabilities Measured) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Assets:    
Cash equivalents $ 75 $ 4,547
Recurring basis    
Assets:    
Cash equivalents 4,547 75
Total Assets 4,547 75
Recurring basis | Level 1    
Assets:    
Cash equivalents 4,547 75
Total Assets 4,547 75
Recurring basis | Level 2    
Assets:    
Cash equivalents 0 0
Total Assets 0 0
Recurring basis | Level 3    
Assets:    
Cash equivalents 0 0
Total Assets $ 0 $ 0