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Business Combination - Schedule of Purchase Price Allocation (Details) - USD ($)
$ in Thousands
Aug. 31, 2015
Mar. 31, 2016
Dec. 31, 2015
Business Combination      
Goodwill   $ 43,184 $ 43,116
Less: Contingent consideration   $ (11,700) $ (11,800)
Ecolink      
Business Combination      
Cash and cash equivalents $ 685    
Accounts receivable 374    
Inventories 1,412    
Prepaid expenses and other current assets 253    
Property, plant and equipment 16    
Non-interest bearing liabilities (1,557)    
Net tangible assets acquired 1,183    
Goodwill 12,564    
Total purchase price 24,527    
Noncontrolling interest (378)    
Net purchase price 24,149    
Less: Contingent consideration (11,200)    
Cash paid 12,949    
Ecolink | Trade name      
Business Combination      
Finite-lived intangible assets $ 400    
Estimated Lives 7 years    
Ecolink | Developed Technology      
Business Combination      
Finite-lived intangible assets $ 9,080    
Ecolink | Customer relationships      
Business Combination      
Finite-lived intangible assets $ 1,300    
Estimated Lives 5 years    
Ecolink | Minimum | Property, plant and equipment      
Business Combination      
Estimated Lives 1 year    
Ecolink | Minimum | Developed Technology      
Business Combination      
Estimated Lives 4 years    
Ecolink | Maximum | Property, plant and equipment      
Business Combination      
Estimated Lives 4 years    
Ecolink | Maximum | Developed Technology      
Business Combination      
Estimated Lives 14 years