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Goodwill and Other Intangible Assets (Schedule of net other intangible assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 6,457 $ 2,196  
Accumulated amortization 1,293 125  
Other intangible assets, Net 5,164 2,071  
Amortization expense 1,168 105 $ 20
Intellectual property [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original cost 200 200  
Accumulated amortization 154 87  
Other intangible assets, Net $ 46 113  
Useful life 3 years    
Current technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 3,833 1,456  
Accumulated amortization 654 28  
Other intangible assets, Net $ 3,179 1,428  
Useful life 3 years    
Customer relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 1,937 540  
Accumulated amortization 272 10  
Other intangible assets, Net $ 1,665 $ 530  
Useful life 3 years    
Backlog [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 487  
Accumulated amortization 213  
Other intangible assets, Net $ 274  
Useful life 4 months 24 days    
Maximum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Useful life 3 years