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Restructuring and Related Charges (Tables)
 12 Months Ended
Dec. 31, 2014
Restructuring and Related Activities [Abstract]  
Summary of Restructuring Charges

The following table summarizes GridSense’s restructuring charges during the years ended December 31, 2013 and 2014:

 

    Years ended
December 31,		  
    2013     2014  
Employee severance and termination benefits   $ 302     $ 119  
Facilities costs     101       —  
Abandonment of fixed assets     39       —  
Inventory obsolescence     152       —  
Other     —       79  
Total   $ 594     $ 198  
Summary of Activity Related to Restructuring

The following table presents activity during the years ended December 31, 2013 and 2014 related to GridSense’s restructuring:

 

    Employee severance and termination benefits     Facilities     Inventory and fixed asset impairments     Other     Total  
Balance at December 31, 2012   $ —     $ —     $ —     $ —     $ —  
Provision     302       101       191       —       594  
Cash payments     (239 )     (101 )     —       —       (340 )
Non-cash settlements     —       —       (191 )     —       (191 )
Balance at December 31, 2013     63       —       —       —       63  
Provision     119       7       —       72       198  
Cash payments     (144 )     (7 )     —       (72 )     (223 )
Balance at December 31, 2014   $ 38     $ —     $ —     $ —     $ 38  

 

The following table presents activity during the years ended December 31, 2013 and 2014 related to OmniMetrix’s restructuring:

 

    Employee severance and termination benefits     Facilities     Fixed asset impairments     Total  
Balance at December 31, 2012   $   —     $  —     $  —     $  —  
Provision     178       202       415       795  
Cash payments     (133 )     (8 )     —       (141 )
Non-cash settlements     —       —       (415 )     (415 )
Balance at December 31, 2013     45       194       —       239  
Provision     —       96       —       96  
Cash payments     (45 )     (42 )     —       (87 )
Balance at December 31, 2014   $  —     $ 248     $ —     $ 248