Goodwill and Intangible Assets, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Schedule of Goodwill and Intangible Assets [Line Items]
Purchased Intangible Assets				$ 12,156
Cost	$ 26,843			15,455
Accumulated Amortization	(4,907)			(3,094)
Net Book Value	21,936			12,361
Intangible assets not subject to amortization	40			40
Total intangible assets, net	21,976		$ 21,976	12,401
Amortization of intangible assets	$ 3,700	$ 700
Goodwill			7,225	1,549
Existing technology
Schedule of Goodwill and Intangible Assets [Line Items]
Estimated Lives	5 years	5 years
Weighted Remaining Average Lives	4 years	5 years
Cost	$ 25,456			14,067
Accumulated Amortization	(4,085)			(2,371)
Net Book Value	$ 21,371			11,696
Patent license
Schedule of Goodwill and Intangible Assets [Line Items]
Estimated Lives	14 years	14 years
Weighted Remaining Average Lives	6 years	7 years
Cost	$ 1,387			1,388
Accumulated Amortization	(822)			(723)
Net Book Value	$ 565			$ 665
1Mobility
Schedule of Goodwill and Intangible Assets [Line Items]
Purchased Intangible Assets			3,700
Goodwill			300
Layered Insight
Schedule of Goodwill and Intangible Assets [Line Items]
Purchased Intangible Assets			9,600
Goodwill			$ 5,376