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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Revenue (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Revenue Recognition, Fixed Price Contracts [Line Items]      
Changes in contract estimates leading to an increase in operating income $ 1,629    
Changes in contract estimates leading to an increase In basic net income per share $ 0.06    
Changes in contract estimates leading to a decrease in operating income   $ 699 $ 930
Changes in contract estimates leading to a decrease In basic net income per share   $ 0.01 $ 0.04
Changes in contract estimates leading to a decrease in diluted net income per share     $ 0.04
Period (in months) of service, advance payment received 12 months    
Customer Relationships [Member] | OmniMetrix Monitoring Systems [Member]
      
Revenue Recognition, Fixed Price Contracts [Line Items]      
Finite-Lived Intangible Asset, Useful Life 24 months