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Business Acquisitions - Major Classes of Assets and Liabilities Acquired (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Feb. 08, 2017
Dec. 31, 2016
Dec. 30, 2016
Business Acquisition [Line Items]        
Goodwill $ 13,183   $ 10,442  
Axon Artificial Intelligence        
Business Acquisition [Line Items]        
Developed technology       $ 5,210
Goodwill       1,615
Total purchase price       $ 6,825
Dextro, Inc.        
Business Acquisition [Line Items]        
Accounts receivable   $ 12    
Property and equipment   46    
Developed technology   5,800    
Goodwill   2,680    
Deferred income tax liabilities, net   (1,051)    
Total purchase price   $ 7,487