Commitments and Contingencies Operating Leases Disclosures - ASC 842 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Earnest Money Deposits and Pre-acquisition Costs Written-Off			$ 210	$ 1,490
Short-term Lease, Cost	$ 200	$ 100	500	300
Operating Lease, Expense	400	300	1,000	900
Operating Lease, Payments	$ 300	$ 300	$ 900	$ 900
Operating Lease, Weighted Average Remaining Lease Term	4 years 10 months 24 days		4 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	4.10%		4.10%