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Acquisitions (Summary of Acquisitions) (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 01, 2015 | Jan. 16, 2015 | Dec. 02, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Purchase Price Allocation |  |  |  |  |  |
Goodwill |  |  |  | $ 10,068 | $ 9,606 | $ 7,998
Net assets acquired |  |  |  | $ 5,173 |  |
Titan Energy Worldwide Inc. [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Acquisition, Name of Acquired Entity |  |  |  | Titan Energy Worldwide, Inc. |  |
Business acquisition, effective date of acquisition |  |  |  | Dec. 02, 2014 |  |
Business combination location within acquiree's segment |  |  |  | Critical Power |  |
Business combination primary form of consideration |  |  |  | Cash/stock |  |
Purchase Price |  |  |  |  |  |
Cash consideration |  |  | $ 953 |  |  |
Common stock consideration |  |  | 1,005 |  |  |
Business combination, separately recognized transactions, assets recognized |  |  | 1,958 |  |  |
Purchase Price Allocation |  |  |  |  |  |
Current assets |  |  | 3,721 |  |  |
Property, plant and equipment |  |  | 410 |  |  |
Identifiable intangible assets |  |  | 5,147 |  |  |
Goodwill |  |  | 2,969 |  |  |
Total assets acquired |  |  | 12,247 |  |  |
Current liabilities |  |  | (7,131) |  |  |
Notes payable |  |  | (3,158) |  |  |
Net assets acquired |  |  | 1,958 | $ 1,958 |  |
Cash and cash equivalents |  |  | $ 100 |  |  |
Harmonics Holdings Inc. [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Acquisition, Name of Acquired Entity |  |  |  | Harmonics Holdings Inc. |  |
Business acquisition, effective date of acquisition |  |  |  | Jan. 16, 2015 |  |
Business combination location within acquiree's segment |  |  |  | T&D Solutions |  |
Business combination primary form of consideration |  |  |  | Seller note/debt forgiveness |  |
Purchase Price |  |  |  |  |  |
Cash consideration |  | $ 93 |  |  |  |
Business combination, separately recognized transactions, assets recognized |  | 1,043 |  |  |  |
Purchase Price Allocation |  |  |  |  |  |
Current assets |  | 21 |  |  |  |
Property, plant and equipment |  | 4 |  |  |  |
Identifiable intangible assets |  | 995 |  |  |  |
Goodwill |  | 23 |  |  |  |
Total assets acquired |  | 1,043 |  |  |  |
Current liabilities |  | 0 |  |  |  |
Net assets acquired |  | 1,043 |  | $ 1,202 |  |
Harmonics Holdings Inc. [Member] | Forgiveness Trade Payables and Indebtedness to Purchaser [Member] |  |  |  |  |  |
Purchase Price |  |  |  |  |  |
Business combination, separately recognized transactions, assets recognized |  | 609 |  |  |  |
Harmonics Holdings Inc. [Member] | Deferred Purchase Price Due To Seller [Member] |  |  |  |  |  |
Purchase Price |  |  |  |  |  |
Business combination, separately recognized transactions, assets recognized |  | $ 341 |  |  |  |
Pacific Power Systems Integration Inc. [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Acquisition, Name of Acquired Entity |  |  |  | Pacific Power Systems Integration, Inc. |  |
Business acquisition, effective date of acquisition |  |  |  | Aug. 01, 2015 |  |
Business combination location within acquiree's segment |  |  |  | T&D Solutions |  |
Business combination primary form of consideration |  |  |  | Cash |  |
Purchase Price |  |  |  |  |  |
Cash consideration | $ 2,013 |  |  |  |  |
Business combination, separately recognized transactions, assets recognized | 2,013 |  |  |  |  |
Purchase Price Allocation |  |  |  |  |  |
Current assets | 18 |  |  |  |  |
Property, plant and equipment | 147 |  |  |  |  |
Identifiable intangible assets | 1,500 |  |  |  |  |
Goodwill | 348 |  |  |  |  |
Total assets acquired | 2,013 |  |  |  |  |
Current liabilities | 0 |  |  |  |  |
Net assets acquired | 2,013 |  |  | $ 2,013 |  |
Pacific Power Systems Integration Inc. [Member] | Forgiveness Trade Payables and Indebtedness to Purchaser [Member] |  |  |  |  |  |
Purchase Price |  |  |  |  |  |
Business combination, separately recognized transactions, assets recognized | 0 |  |  |  |  |
Pacific Power Systems Integration Inc. [Member] | Deferred Purchase Price Due To Seller [Member] |  |  |  |  |  |
Purchase Price |  |  |  |  |  |
Business combination, separately recognized transactions, assets recognized | $ 0 |  |  |  |  |

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