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Asset Acquisition (Details) - USD ($)
$ in Thousands
Jan. 07, 2018
Jul. 02, 2016
Dec. 31, 2018
Jan. 05, 2018
Dec. 31, 2017
Business Acquisition [Line Items]          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory       $ 848  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equipment       67  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill       1,845  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets       2,760  
Business Combination, Consideration Transferred $ 1,200 $ 244,300      
Business Combination, Contingent Consideration, Liability, Current     $ 1,071 920  
Business Combination, Contingent Consideration, Liability, Noncurrent     $ 0 $ 640 $ 42,000