Business Acquisitions (Details 1) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Finite-lived intangible asset	$ 5,800
DVTEL [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset	27,380
Patented Technology [Member] | DVTEL [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset	$ 21,500
Finite-Lived Intangible Asset, Useful Life	7 years 6 months
Order or Production Backlog [Member] | DVTEL [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset	$ 380
Finite-Lived Intangible Asset, Useful Life	1 year
Customer relationships | DVTEL [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset	$ 3,800
Finite-Lived Intangible Asset, Useful Life	10 years
In Process Research and Development [Member] | DVTEL [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset	$ 1,700
In Process Research and Development [Member] | DVTEL [Member]
Business Acquisition [Line Items]
Indefinite-lived Intangible Assets Acquired	indefinite