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Acquisitions (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) entity	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Number of businesses acquired | entity	3
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
Harmonics Holdings Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, effective date of acquisition	Jan. 16, 2015
Transaction costs incurred	$ 13
Pacific Power Systems Integration Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, effective date of acquisition	Aug. 01, 2015
Transaction costs incurred	$ 43

X

- Definition

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

+ References

No definition available.

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X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e845-128460

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Acquisition Date
-URI http://asc.fasb.org/extlink&oid=6919109

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e848-128460

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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- Definition

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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

The number of businesses acquired by the entity during the period.

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- Details

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