Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Contribution Plan Disclosure [Line Items]
Maximum annual contributions per employee	100.00%
Defined contribution plan, cost	$ 645	$ 230
Foreign Plan
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost	$ 81	$ 56
Defined Contribution Plan, Tranche One
Defined Contribution Plan Disclosure [Line Items]
Maximum annual contributions per employee	3.00%
Employer matching contribution	100.00%
Defined Contribution Plan, Tranche Two
Defined Contribution Plan Disclosure [Line Items]
Maximum annual contributions per employee	2.00%
Employer matching contribution	50.00%