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Fair Value Measurements (Fair Value Assets Measured on Recurring Basis Unobservable Inputs Reconciliation) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Assets measured at fair value on a recurring basis    
Beginning Balance $ 56 $ 56
Change in Fair Value 0 0
Ending Balance $ 56 $ 56