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Business Combination - Narrative (Details) - USD ($)
$ in Thousands
Apr. 01, 2018
Jun. 30, 2018
Dec. 31, 2017
Business Acquisition [Line Items]      
Goodwill   $ 1,849 $ 1,549
1Mobility      
Business Acquisition [Line Items]      
Total purchase price $ 4,000    
Deferred consideration 600    
Technology-based intangible assets 3,700    
Goodwill $ 300    
Estimated useful life of technology-based intangible assets 15 years