Business Segment and Geograhic Information (Reconciliation of Revenue from Segments to Consolidated) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 28,887us-gaap_Revenues	$ 20,893us-gaap_Revenues
Operating Income (Loss)	(84)us-gaap_OperatingIncomeLoss	995us-gaap_OperatingIncomeLoss
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	28,887	20,893
Depreciation and Amortization	783	405
Operating Income (Loss)	(84)	995
Operating Segments [Member] \| T & D Solutions Segment [Member]
Segment Reporting Information [Line Items]
Revenues	23,663	19,750
Depreciation and Amortization	392	377
Operating Income (Loss)	1,549	1,558
Operating Segments [Member] \| Critical Power Solutions Segment [Member]
Segment Reporting Information [Line Items]
Revenues	5,224	1,143
Depreciation and Amortization	375	18
Operating Income (Loss)	(831)	33
Operating Segments [Member] \| Corporate Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and Amortization	16	10
Operating Income (Loss)	$ (802)	$ (596)

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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