Business Combination Business Combination - Purchase Price Allocation (Details) - USD ($) $ in Thousands			12 Months Ended
		Aug. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	[1]			$ 12,564
Minimum
Business Acquisition [Line Items]
Intangible asset, estimated useful life			1 year
Maximum
Business Acquisition [Line Items]
Intangible asset, estimated useful life			15 years
Developed technology | Minimum
Business Acquisition [Line Items]
Intangible asset, estimated useful life			5 years
Developed technology | Maximum
Business Acquisition [Line Items]
Intangible asset, estimated useful life			15 years
Customer relationships | Minimum
Business Acquisition [Line Items]
Intangible asset, estimated useful life			10 years
Customer relationships | Maximum
Business Acquisition [Line Items]
Intangible asset, estimated useful life			15 years
Ecolink Intelligent Technology, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents		$ 685
Accounts receivable		374
Inventories		1,412
Prepaid expenses and other current assets		253
Property, plant and equipment		16
Non-interest bearing liabilities		(1,557)
Net tangible assets acquired		1,183
Goodwill		12,564
Total purchase price		24,527
Noncontrolling interest in Encore		(378)
Net purchase price		24,149
Less: Contingent consideration		(11,200)
Cash paid		12,949
Ecolink Intelligent Technology, Inc. | Minimum
Business Acquisition [Line Items]
Property, plant and equipment, estimated useful life			1 year
Ecolink Intelligent Technology, Inc. | Maximum
Business Acquisition [Line Items]
Property, plant and equipment, estimated useful life			4 years
Ecolink Intelligent Technology, Inc. | Trade Names
Business Acquisition [Line Items]
Intangible assets		$ 400
Intangible asset, estimated useful life		7 years	7 years
Ecolink Intelligent Technology, Inc. | Developed technology
Business Acquisition [Line Items]
Intangible assets		$ 9,080
Ecolink Intelligent Technology, Inc. | Developed technology | Minimum
Business Acquisition [Line Items]
Intangible asset, estimated useful life			4 years
Ecolink Intelligent Technology, Inc. | Developed technology | Maximum
Business Acquisition [Line Items]
Intangible asset, estimated useful life			14 years
Ecolink Intelligent Technology, Inc. | Customer relationships
Business Acquisition [Line Items]
Intangible assets		$ 1,300
Intangible asset, estimated useful life		5 years	5 years

[1] During 2015, we recognized $12.6 million of goodwill related to the Ecolink Intelligent Technology, Inc. acquisition. Please refer to Note 22 for further information about this acquisition.