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Business Combination (Schedule of Purchase Price Allocation) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Apr. 28, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]        
Goodwill $ 36,061   $ 22,799 $ 23,635
Nesscap        
Business Acquisition [Line Items]        
Cash and cash equivalents   $ 909    
Accounts receivable   2,545    
Inventories   4,397    
Prepaid expenses and other assets   764    
Property and equipment   3,314    
Intangible assets   11,800    
Accounts payable, accrued compensation and other liabilities   (5,713)    
Employee severance obligation   (3,340)    
Total identifiable net assets   14,676    
Goodwill   11,624    
Total purchase price   $ 26,300