Contingencies and Commitments - Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases, Operating [Abstract]
Operating Leases, Rent Expense	$ 300	$ 300	$ 300
2020	217
2021	92
Future minimum lease payments	$ 309