The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

-Publisher FASB

-Name Accounting Standards Codification

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

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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

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Amount of increase (decrease) of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit, from foreign currency translation and purchase accounting adjustments.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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GOODWILL AND INTANGIBLE ASSETS Schedule of Intangibles (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 3,549		$ 3,549		$ 3,735
Impairment of Intangible Assets, Finite-lived	0	1,116	0	1,116
Amortization			(218)	(497)
Cumulative Translation Adjustment			32
Energy & Security Sonar Solutions Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived		0		0
Finite-Lived Intangible Assets, Weighted-Average Useful Life			6 years
Energy & Security Sonar Solutions Segment [Member] \| Gross cost intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	578		578		572
Amortization			0
Cumulative Translation Adjustment			6
Energy & Security Sonar Solutions Segment [Member] \| Accumulated amortization intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	(532)		(532)		(482)
Amortization			(41)
Cumulative Translation Adjustment			(9)
GridSense segment [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived		0		0
Finite-Lived Intangible Assets, Weighted-Average Useful Life			11 years 1 month 10 days
GridSense segment [Member] \| Gross cost intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	2,332		2,332		2,271
Amortization			0
Cumulative Translation Adjustment			61
GridSense segment [Member] \| Accumulated amortization intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	(938)		(938)		(811)
Amortization			(101)
Cumulative Translation Adjustment			(26)
USSI segment [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived		0		0
Finite-Lived Intangible Assets, Weighted-Average Useful Life			20 years
USSI segment [Member] \| Gross cost intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	2,715		2,715		2,715
Amortization			0
Cumulative Translation Adjustment			0
USSI segment [Member] \| Accumulated amortization intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	(606)		(606)		(530)
Amortization			(76)
Cumulative Translation Adjustment			0
Power Generation Monitoring segment [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived		1,116		1,116
All Other Segments [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived		$ 0		$ 0