Commitments and Contingencies Operating Leases Disclosures - ASC 842 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Earnest Money Deposits and Pre-acquisition Costs Written-Off			$ 1,532	$ 503
Short-term Lease, Cost	$ 100	$ 100	200	200
Operating Lease, Expense	300	300	600	600
Operating Lease, Payments	$ 300	$ 300	$ 600	$ 600
Operating Lease, Weighted Average Remaining Lease Term	3 years 3 months 18 days		3 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.90%		4.90%