Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 23	$ 26	$ 49	$ 43
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					$ 324,800
Tax credit carryforwards					8,900
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					6,500
Tax credit carryforwards					$ 1,600