Income Taxes - Domestic And Foreign Components Of Income Before Provision For Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
United States	$ (40,774)	$ (16,362)	$ (12,933)
(Loss) income before provision for (benefit from) income taxes	(19,939)	(10,630)	(5,489)
Israel [Member]
Income Tax Contingency [Line Items]
Foreign	15,622	2,257	4,614
United Kingdom [Member]
Income Tax Contingency [Line Items]
Foreign	2,345	1,564	1,612
Netherlands [Member]
Income Tax Contingency [Line Items]
Foreign	3,104	1,919	1,462
Australia [Member]
Income Tax Contingency [Line Items]
Foreign	(2,774)	(565)	(513)
Germany [Member]
Income Tax Contingency [Line Items]
Foreign	2,085	327	172
Japan [Member]
Income Tax Contingency [Line Items]
Foreign	$ 453	$ 230	$ 97

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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