ACQUISITION OF OMNIMETRIX Schedule of intangible assets acquired (Details) (USD $) In Thousands, unless otherwise specified		6 Months Ended
Feb. 15, 2012	Jun. 30, 2011 OmniMetrix technologies [Member] years	Jun. 30, 2011 Customer Relationships [Member] years	Jun. 30, 2011 Noncompete Agreements [Member] years
Acquired Finite-Lived Intangible Assets [Line Items]
Omnimetrix technologies	$ 2,319
Customer Relationships	3,236
Noncompete Agreements	26
Acquired Finite-lived Intangible Asset, Amount	$ 5,581
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life		10	14	6

The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 44

-Subparagraph a(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275

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