Segments - Additional Information (Details) - Non-US - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Long-lived assets	$ 4,869		$ 4,869		$ 5,908
Revenues	$ 93	$ 118	$ 443	$ 481