Income Taxes - Reconciliation of Total Amounts of Unrecognized Tax Benefits Excluding Interest and Penalties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits
Balance at Beginning of the Year	$ 2,197	$ 0	$ 0
Decreases as a Result of Tax Positions Taken in Prior Years	0	0	0
Increases as a Result of Tax Positions Taken in the Current Year	368	2,197	0
Balance at End of the Year	$ 2,565	$ 2,197	$ 0