Commitments and Contingencies - Additional Lease Disclosures and Other Commitments and Contingencies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating Cash Flows Supplemental Information:
Cash paid for amounts included in the measurement of the operating lease liabilities	$ 515
Right-of-use assets obtained in exchange for operating lease obligations	1,647
Future payments of operating lease liabilities, ASC 842
2020	507
2021	515
2022	522
2023	533
Total lease payments	2,077
Less imputed interest	(368)
Present value of operating lease liabilities	1,709
Future minimum expected lease payments under non-cancelable operating leases, ASC 840
Total	3,222
2020	1,647
2021	546
2022	522
2023	507
Other contractual commitments
Total	52,406
2020	10,274
2021	9,043
2022	9,690
2023	9,911
2024	6,744
Thereafter	6,744
Future minimum contractual obligations and commitments
Total	55,628
2020	11,921
2021	9,589
2022	10,212
2023	10,418
2024	6,744
Thereafter	6,744
Other Commitments and Contingencies
Contingent liabilities	$ 0