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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, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]          
Intangible assets $ 7,846   $ 7,846   $ 9,561
Impairment of Intangible Assets, Finite-lived (1,116) 0 (1,116) 0  
Payments to Acquire Intangible Assets     0 (150)  
Amortization     (497) (456)  
Cumulative Translation Adjustment     (102)    
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 549   549   532
Impairment of Intangible Assets, Finite-lived     0    
Amortization     0    
Cumulative Translation Adjustment     17    
Energy & Security Sonar Solutions Segment [Member] | Accumulated amortization intangibles [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets (419)   (419)   (364)
Impairment of Intangible Assets, Finite-lived     0    
Amortization     (41)    
Cumulative Translation Adjustment     (14)    
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     10 years    
GridSense segment [Member] | Gross cost intangibles [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets 2,632   2,632   2,777
Impairment of Intangible Assets, Finite-lived     0    
Amortization     0    
Cumulative Translation Adjustment     (145)    
GridSense segment [Member] | Accumulated amortization intangibles [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets (970)   (970)   (873)
Impairment of Intangible Assets, Finite-lived     0    
Amortization     (137)    
Cumulative Translation Adjustment     40    
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
Impairment of Intangible Assets, Finite-lived     0    
Amortization     0    
Cumulative Translation Adjustment     0    
USSI segment [Member] | Accumulated amortization intangibles [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets (455)   (455)   (380)
Impairment of Intangible Assets, Finite-lived     0    
Amortization     (75)    
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)    
Finite-Lived Intangible Assets, Weighted-Average Useful Life     12 years    
Power Generation Monitoring segment [Member] | Gross cost intangibles [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets 3,269   3,269   4,385
Impairment of Intangible Assets, Finite-lived     (1,116)    
Amortization     0    
Cumulative Translation Adjustment     0    
Power Generation Monitoring segment [Member] | Accumulated amortization intangibles [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets (486)   (486)   (309)
Impairment of Intangible Assets, Finite-lived     0    
Amortization     (177)    
Cumulative Translation Adjustment     0    
All Other Segments [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Impairment of Intangible Assets, Finite-lived 0   0    
Finite-Lived Intangible Assets, Weighted-Average Useful Life     9 years [1]    
All Other Segments [Member] | Gross cost intangibles [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets 1,196 [1]   1,196 [1]   1,196 [1]
Impairment of Intangible Assets, Finite-lived     0    
Amortization     0 [1]    
Cumulative Translation Adjustment     0 [1]    
All Other Segments [Member] | Accumulated amortization intangibles [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets (185) [1]   (185) [1]   (118) [1]
Impairment of Intangible Assets, Finite-lived     0    
Amortization     (67) [1]    
Cumulative Translation Adjustment     $ 0 [1]    
[1] ** Results for the Cathodic Protection segment are included in "Other" in Segment Reporting (see Note 10).