Segment, Geographic and Customer Concentration Information - Revenue by Region and Country (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Concentration Risk [Line Items]
Revenue	$ 13,060	$ 32,099	$ 44,382	$ 77,516
Revenue | Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	100.00%	100.00%	100.00%	100.00%
North America
Concentration Risk [Line Items]
Revenue	$ 5,526	$ 22,081	$ 15,841	$ 35,984
North America | Revenue | Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	43.00%	69.00%	36.00%	46.00%
Asia Pacific
Concentration Risk [Line Items]
Revenue	$ 3,813	$ 4,907	$ 18,574	$ 30,681
Asia Pacific | Revenue | Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	29.00%	15.00%	42.00%	40.00%
Europe, Middle East and Africa
Concentration Risk [Line Items]
Revenue	$ 3,721	$ 5,111	$ 9,967	$ 10,851
Europe, Middle East and Africa | Revenue | Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	28.00%	16.00%	22.00%	14.00%