Commitments and Contingencies Operating Leases Disclosures - ASC 842 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Earnest Money Deposits and Pre-acquisition Costs Written-Off			$ 43	$ 1,532
Short-term Lease, Cost	$ 200	$ 100	300	200
Operating Lease, Expense	400	300	700	600
Operating Lease, Payments	$ 300	$ 300	$ 600	$ 600
Operating Lease, Weighted Average Remaining Lease Term	5 years 6 months		5 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	4.20%		4.20%