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GOODWILL AND INTANGIBLE ASSETS (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Goodwill [Roll Forward]  
Goodwill $ 6,630,000
Goodwill, Translation Adjustments 16,000
Goodwill 6,646,000
Energy & Security Sonar Solutions Segment [Member]
 
Goodwill [Roll Forward]  
Goodwill 541,000
Goodwill, Translation Adjustments 7,000
Goodwill 548,000
GridSense segment [Member]
 
Goodwill [Roll Forward]  
Goodwill 2,757,000
Goodwill, Translation Adjustments 9,000
Goodwill 2,766,000
USSI segment [Member]
 
Goodwill [Roll Forward]  
Goodwill 1,402,000
Goodwill, Translation Adjustments 0
Goodwill 1,402,000
Power Generation Monitoring segment [Member]
 
Goodwill [Roll Forward]  
Goodwill 1,517,000
Goodwill, Translation Adjustments 0
Goodwill 1,517,000
All Other Segments [Member]
 
Goodwill [Roll Forward]  
Goodwill 413,000 [1]
Goodwill, Translation Adjustments 0 [1]
Goodwill $ 413,000 [1]
[1] * Results for the Cathodic Protection segment are included in "Other" in Segment Reporting (see Note 9).