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Business Combinations - Explosive Trace Detection (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Jul. 07, 2017
Jun. 30, 2017
Allocation of total consideration to assets acquired and liabilities assumed      
Goodwill $ 282,656   $ 242,129
Explosive Trace Detection Business      
Allocation of total consideration to assets acquired and liabilities assumed      
Cash and cash equivalents   $ 4  
Accounts receivable   12,359  
Inventories   12,269  
Property and equipment   1,594  
Intangible assets $ 30,040 30,040  
Other long term assets   303  
Accounts payable   (3,070)  
Accrued payroll and related expenses   (2,450)  
Deferred revenues - current   (2,068)  
Accrued warranties   (1,260)  
Other accrued expenses and current liabilities   (1,018)  
Net assets acquired   46,703  
Goodwill   33,764  
Total consideration   $ 80,467