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Product Sales (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Revenue from External Customers by Geographic Areas
Product sales by customer geographic location was as follows (in thousands):
Year Ended December 31, 2020
United States$193,630 
Rest of world6,242 
Total $199,872 
Total revenue by geographic area of our customers and collaboration partners was as follows (in thousands):

Years Ended December 31,
202020192018
United States$764,529 $54,976 $89,075 
Rest of world38,866 5,233 45,993 
Total $803,395 $60,209 $135,068