Stock-Based Compensation (Stock-Based Compensation Expense Recognized In General And Administrative Expenses) (Details) - 2016 Plan [Member] - General and Administrative Expenses [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total compensation expense		$ (214)
Total compensation expense	$ 2,652		$ 1,303