Geographic Information and Major Customer and Product Data - Revenues Within Geographical Areas (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenue		$ 56,360	$ 53,528
North America
Segment Reporting Information [Line Items]
Revenue		37,849	31,620
EMEA
Segment Reporting Information [Line Items]
Revenue	[1]	16,400	20,347
Rest of World
Segment Reporting Information [Line Items]
Revenue		$ 2,111	$ 1,561

[1] Sales to customers in France accounted for $6,241 and $6,754 of the Company’s revenues for the three months ended March 31, 2019 and 2018, respectively. Sales to customers in the United Kingdom did not exceed 10% of total revenues for the three months ended March 31, 2019 and accounted for $5,694 of the Company’s revenues for the three months ended March 31, 2018.