Segment Information - Summary of Revenue Based on Customer's Location Determined by Customer's Shipping Address (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 52,101	$ 68,722	$ 87,587	$ 157,796
North America - United States
Segment Reporting Information [Line Items]
Total revenue	15,432	22,076	29,988	58,147
North America - Canada
Segment Reporting Information [Line Items]
Total revenue	8,038	9,955	11,911	20,047
North America
Segment Reporting Information [Line Items]
Total revenue	23,470	32,031	41,899	78,194
Europe, Middle East and Africa - Germany
Segment Reporting Information [Line Items]
Total revenue	5,544	15,072	7,824	23,205
Europe, Middle East and Africa - Other
Segment Reporting Information [Line Items]
Total revenue	7,762	3,840	12,850	19,864
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Total revenue	13,306	18,912	20,674	43,069
Asia-Pacific - Japan
Segment Reporting Information [Line Items]
Total revenue	6,350	5,019	9,866	8,823
Asia-Pacific - Other
Segment Reporting Information [Line Items]
Total revenue	1,490	3,390	2,698	8,937
Asia-Pacific
Segment Reporting Information [Line Items]
Total revenue	7,840	8,409	12,564	17,760
Latin America
Segment Reporting Information [Line Items]
Total revenue	$ 7,485	$ 9,370	$ 12,450	$ 18,773