Segments - Additional Information (Details) - Non-US - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Long-lived assets	$ 5,954		$ 5,954		$ 6,724
Revenues	$ 118	$ 243	$ 481	$ 1,008