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RESTRUCTURING AND RELATED CHARGES Summary of restructuring charges (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
GridSense - Legal Entity [Member]
Sep. 30, 2013
GridSense - Legal Entity [Member]
Sep. 30, 2014
OmniMetrix - Legal Entity [Member]
Dec. 31, 2013
OmniMetrix - Legal Entity [Member]
Restructuring Cost and Reserve [Line Items]                
Employee severance and termination benefits               $ 178
Facilities costs             96 202
Restructuring costs - abandonment of fixed assets     0 573       415
Total $ 184 $ 772 $ 382 $ 1,366 $ 198 $ 594