Business Acquisitions (Details 1) - USD ($) $ in Thousands	Nov. 30, 2016	Nov. 04, 2016
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 200
Prox Dynamics, AS [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 134,088
Prox Dynamics, AS [Member] | Product Technology [Member]
Business Acquisition [Line Items]
Estimated Useful Life	8 years
Prox Dynamics, AS [Member] | Patented Technology [Member]
Business Acquisition [Line Items]
Estimated Useful Life	8 years
Finite-lived intangible assets acquired	$ 3,100
Prox Dynamics, AS [Member] | Trade name
Business Acquisition [Line Items]
Estimated Useful Life	7 years
Finite-lived intangible assets acquired	$ 3,500
Prox Dynamics, AS [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Estimated Useful Life	8 years
Finite-lived intangible assets acquired	$ 1,400
Prox Dynamics, AS [Member] | Developed technology
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired	23,400
Point Grey Research, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		259,161
Intangible assets acquired		$ 39,800
Point Grey Research, Inc. [Member] | Product Technology [Member]
Business Acquisition [Line Items]
Estimated Useful Life		10 years
Point Grey Research, Inc. [Member] | Trade name
Business Acquisition [Line Items]
Estimated Useful Life		7 years
Finite-lived intangible assets acquired		$ 13,200
Point Grey Research, Inc. [Member] | Backlog
Business Acquisition [Line Items]
Estimated Useful Life		1 year
Finite-lived intangible assets acquired		$ 2,300
Point Grey Research, Inc. [Member] | Non-Competition Agreements
Business Acquisition [Line Items]
Estimated Useful Life		5 years
Finite-lived intangible assets acquired		$ 1,000
Point Grey Research, Inc. [Member] | Developed technology
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired		$ 23,100
Prox Dynamics [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	134,088
Intangible assets acquired	$ 31,400