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SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Major customers (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue, Major Customer [Line Items]
Revenues	$ 5,825	$ 4,982	$ 5,233	$ 5,716	$ 4,796	$ 4,713	$ 5,727	$ 4,183	$ 21,756	$ 19,419	$ 18,928
Energy & Security Sonar Solutions Segment [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Revenues									2,948	309	89
Percent of total revenues									14.00%	2.00%	0.00%
Energy & Security Sonar Solutions Segment [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Revenues									361	1,504	2,094
Percent of total revenues									2.00%	8.00%	11.00%
Energy & Security Sonar Solutions Segment [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Revenues									2,336	7,434	2,155
Percent of total revenues									11.00%	38.00%	11.00%
GridSense segment [Member] | Customer D [Member]
Revenue, Major Customer [Line Items]
Revenues									$ 87	$ 187	$ 2,436
Percent of total revenues									0.00%	1.00%	13.00%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

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



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-Publisher SEC

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