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Leases - Components of Lease Cost (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]  
Finance Lease costs, Amortization of lease assets $ 8
Finance Lease costs, Interest on lease liabilities 2
Total lease cost 14,919
Cost of goods sold  
Lessee, Lease, Description [Line Items]  
Operating Lease costs 2,361
Selling, general and administrative  
Lessee, Lease, Description [Line Items]  
Operating Lease costs 11,775
Research and development  
Lessee, Lease, Description [Line Items]  
Operating Lease costs $ 773