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ACQUISITION OF OMNIMETRIX Fair value of assets and liabilities acquired (Details) (USD $) In Thousands, unless otherwise specified	May 20, 2010	May 12, 2010	Dec. 31, 2012 OmniMetrix acquistion [Member]	Feb. 15, 2012 OmniMetrix acquistion [Member]
Business Acquisition [Line Items]
Cash				$ 665
Accounts receivable			328	328
Inventory			234	234
Other current assets			10	10
Property and equipment			26	26
Intangible assets			5,581	5,581
Goodwill			1,930	1,930
Total assets acquired				8,774
Current liabilities			274	(274)
Fair value acquired	$ (402)	$ (4,406)		$ 8,500

X

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

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- Definition

The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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The amount of acquisition cost of a business combination allocated to prepaid expenses and other current assets. Does not include amounts allocated to cash and cash equivalents, marketable securities, receivables, inventory, and assets not to be used.

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The amount of acquisition cost of a business combination allocated to receivables.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

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-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.



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-Paragraph 37

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