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Acquisitions (Narrative) (Details)	6 Months Ended
	Jun. 30, 2015 USD ($) entity	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Number of businesses acquired | entity	2
Titan Energy Worldwide Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, effective date of acquisition	Dec. 02, 2014
Equity method investment, ownership percentage		100.00%
Transaction costs incurred		$ 700,000
Harmonics Holdings Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, effective date of acquisition	Jan. 16, 2015
Transaction costs incurred	$ 13,000

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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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-Name Accounting Standards Codification



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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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