Geographic Information and Major Customer and Product Data - Revenues Within Geographical Areas (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues		$ 270,288	$ 215,390	$ 165,863
North America
Segment Reporting Information [Line Items]
Revenues		167,361	139,720	106,069
EMEA
Segment Reporting Information [Line Items]
Revenues	[1]	93,816	68,998	53,170
Rest of World
Segment Reporting Information [Line Items]
Revenues		$ 9,111	$ 6,672	$ 6,624

[1] Sales to customers in France accounted for $31,532, $22,658 and $17,103 for the years ended December 31, 2018, 2017 and 2016, respectively.