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GOODWILL AND INTANGIBLE ASSETS Schedule of Intangibles (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]      
Intangible assets $ 9,561 $ 4,780 $ 5,339
Payments to Acquire Intangible Assets (150) 0 0
Intangible Assets Acquired in Acquisition 5,581    
Amortization (977) (532)  
Cumulative Translation Adjustment 27 (27)  
Energy & Security Sonar Solutions Segment [Member]
      
Finite-Lived Intangible Assets [Line Items]      
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 532 519 560
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 0 0  
Cumulative Translation Adjustment 13 (41)  
Energy & Security Sonar Solutions Segment [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets (364) [1] (274) [1] (207) [1]
Payments to Acquire Intangible Assets 0 [1]    
Intangible Assets Acquired in Acquisition 0 [1]    
Amortization 81 [1] 81 [1]  
Cumulative Translation Adjustment (9) [1] 14 [1]  
GridSense segment [Member]
      
Finite-Lived Intangible Assets [Line Items]      
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 2,777 2,748 2,747
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 0 0  
Cumulative Translation Adjustment 29 1  
GridSense segment [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets (873) [1] (543) [1] (219) [1]
Payments to Acquire Intangible Assets 0 [1]    
Intangible Assets Acquired in Acquisition 0 [1]    
Amortization 324 [1] 323 [1]  
Cumulative Translation Adjustment (6) [1] (1) [1]  
USSI segment [Member]
      
Finite-Lived Intangible Assets [Line Items]      
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 2,565 2,565
Payments to Acquire Intangible Assets (150)    
Intangible Assets Acquired in Acquisition 0    
Amortization 0 0  
Cumulative Translation Adjustment 0 0  
USSI segment [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets (380) [1] (235) [1] (107) [1]
Payments to Acquire Intangible Assets 0 [1]    
Intangible Assets Acquired in Acquisition 0 [1]    
Amortization 145 [1] 128 [1]  
Cumulative Translation Adjustment 0 [1] 0 [1]  
Power Generation Monitoring segment [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Weighted-Average Useful Life 13 years    
Power Generation Monitoring segment [Member] | Gross cost intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets 4,385 0 0
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 4,385    
Amortization 0 0  
Cumulative Translation Adjustment 0 0  
Power Generation Monitoring segment [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets (309) [1] 0 [1] 0 [1]
Payments to Acquire Intangible Assets 0 [1]    
Intangible Assets Acquired in Acquisition 0 [1]    
Amortization 309 [1] 0 [1]  
Cumulative Translation Adjustment 0 [1] 0 [1]  
All Other Segments [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Weighted-Average Useful Life 9 years [2]    
All Other Segments [Member] | Gross cost intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets 1,196 [2] 0 [2] 0 [2]
Payments to Acquire Intangible Assets 0 [2]    
Intangible Assets Acquired in Acquisition 1,196 [2]    
Amortization 0 [2] 0 [2]  
Cumulative Translation Adjustment 0 [2] 0 [2]  
All Other Segments [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets (118) [1],[2] 0 [1],[2] 0 [1],[2]
Payments to Acquire Intangible Assets 0 [1],[2]    
Intangible Assets Acquired in Acquisition 0 [1],[2]    
Amortization 118 [1],[2] 0 [1],[2]  
Cumulative Translation Adjustment $ 0 [1],[2] $ 0 [1],[2]  
[1] Accumulated amortization
[2] Results for the Cathodic Protection segment are included in "Other" in Segment Reporting (see Note 20).