Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Weighted average remaining lease term	49 years 3 months 18 days		49 years 3 months 18 days
Weighted average discount rate	8.60%		8.60%
Rent expense	$ 0.1	$ 0.3	$ 0.2	$ 0.7
Lease rent deferred	$ 3.5		3.5
Lease rent waived			$ 2.4
Weighted average payback period for remaining deferred rent receivable			10 months