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Business Combination (Schedule of Purchase Price Allocation) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Apr. 28, 2017
Business Acquisition [Line Items]      
Goodwill $ 36,636 $ 36,061  
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