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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.

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