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GOODWILL AND INTANGIBLE ASSETS Schedule of Intangibles (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets $ 10,056   $ 4,780
Payments to Acquire Intangible Assets (150) 0  
Intangible Assets Acquired in Acquisition 5,581    
Amortization (456) (267)  
Cumulative Translation Adjustment 1    
Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets (706)    
Energy & Security Sonar Solutions Segment [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Weighted-Average Useful Life 6    
Energy & Security Sonar Solutions Segment [Member] | Gross cost intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets 506   519
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 0    
Cumulative Translation Adjustment (13)    
Energy & Security Sonar Solutions Segment [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets (306)   (274)
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 41    
Cumulative Translation Adjustment 9    
GridSense segment [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Weighted-Average Useful Life 10    
GridSense segment [Member] | Gross cost intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets 2,754   2,748
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 0    
Cumulative Translation Adjustment 6    
GridSense segment [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets     (543)
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 162    
Cumulative Translation Adjustment (1)    
USSI segment [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Weighted-Average Useful Life 20    
USSI segment [Member] | Gross cost intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets 2,715   2,565
Payments to Acquire Intangible Assets (150)    
Intangible Assets Acquired in Acquisition 0    
Amortization 0    
Cumulative Translation Adjustment 0    
USSI segment [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets (305)   (235)
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 70    
Cumulative Translation Adjustment 0    
Power Generation Monitoring segment [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Weighted-Average Useful Life 13    
Power Generation Monitoring segment [Member] | Gross cost intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets 4,385   0
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 4,385    
Amortization 0    
Cumulative Translation Adjustment 0    
Power Generation Monitoring segment [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets (132)   0
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 132    
Cumulative Translation Adjustment 0    
All Other Segments [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Weighted-Average Useful Life 9    
All Other Segments [Member] | Gross cost intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets 1,196   0
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 1,196    
Amortization 0    
Cumulative Translation Adjustment 0    
All Other Segments [Member] | Accumulated amortization intangibles [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets (51)   0
Payments to Acquire Intangible Assets 0    
Intangible Assets Acquired in Acquisition 0    
Amortization 51    
Cumulative Translation Adjustment $ 0