Geographic Information and Major Customer and Product Data - Revenues Within Geographical Areas (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Revenues		$ 62,190	$ 49,431	$ 115,718	$ 89,024
North America
Segment Reporting Information [Line Items]
Revenues		38,441	34,428	70,061	59,865
EMEA
Segment Reporting Information [Line Items]
Revenues	[1]	21,481	13,406	41,828	26,101
Rest of World
Segment Reporting Information [Line Items]
Revenues		$ 2,268	$ 1,597	$ 3,829	$ 3,058

[1] Sales to customers in France accounted for $6,504 and $5,071 of the Company’s revenues for the three months ended June 30, 2018 and 2017, respectively. Sales to customers in the UK accounted for $7,111 of the Company’s revenues for the three months ended June 30, 2018 and did not exceed 10% of total revenues for the three months ended June 30, 2017. Sales to customers in France and the UK accounted for $13,259 and $12,805, respectively, of the Company’s revenues for the six months ended June 30, 2018 and did not exceed 10% of total revenues for the six months ended June 30, 2017.