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GOODWILL AND INTANGIBLE ASSETS
 9 Months Ended
Sep. 30, 2014
GOODWILL AND INTANGIBLE ASSETS [Abstract]  
Goodwill and Intangible Assets Disclosure
GOODWILL AND INTANGIBLE ASSETS
 
(a) Goodwill
 
The changes in the carrying amounts of goodwill by segment from December 31, 2013 to September 30, 2014 were as follows:
 
        
 
 
Energy & Security Sonar Solutions segment
 
GridSense segment
 
Oil & Gas Sensor systems segment
 
Total
Balance as of December 31, 2013
 
$
581

 
$
2,446

 
$
1,402

 
$
4,429

Translation adjustment
 
(35
)
 
(42
)
 
—

 
(77
)
Balance as of September 30, 2014
 
$
546

 
$
2,404

 
$
1,402

 
$
4,352




(b) Intangibles
 
The changes in the carrying amounts and accumulated amortization of intangible assets from December 31, 2013 to September 30, 2014 were as follows:

 
 
Energy &
Security Sonar
Solutions
segment
 
GridSense segment
 
Oil & Gas Sensor systems segment
 
 
 
 
Cost
 
A.A.*
 
Cost
 
A.A.*
 
Cost
 
A.A.*
 
Total
Balance as of December 31, 2013
 
$
572

 
$
(482
)
 
$
2,271

 
$
(811
)
 
$
2,715

 
$
(530
)
 
$
3,735

Amortization
 
—

 
(61
)
 
—

 
(152
)
 
—

 
(113
)
 
(326
)
Translation adjustment
 
(35
)
 
27

 
(25
)
 
14

 
—

 
—

 
(19
)
Balance as of September 30, 2014
 
$
537

 
$
(516
)
 
$
2,246

 
$
(949
)
 
$
2,715

 
$
(643
)
 
$
3,390

Weighted average estimated useful lives in years
 
6.0
 
11.1
 
20.0
 
 

 
*    Accumulated amortization


The composition of intangibles in each of the Company's segments are as follows:

Segment
 
Type of Intangible
Energy & Security Sonar Solutions
 
Naval technologies
GridSense
 
Software, customer relationships and trade name
USSI
 
Sensor technologies and license


     Amortization expense for the nine months ended September 30, 2013 and 2014 amounted to $733 and $326, respectively. Amortization expense with respect to intangible assets is estimated to be $368, $348, $348, $348 and $331 for each of the years ending September 30, 2015 through 2019.