Fair Value of Financial Instruments (Summary of Fair Value of Financial Assets Measured on a Recurring Basis) (Details) - Level 1 [Member] - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 16,371	$ 5,948
Restricted cash	$ 655	$ 1,811