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Segment Information (Tables)
3 Months Ended
Mar. 31, 2020
Segment Reporting [Abstract]  
Revenue from External Customers by Geographic Areas
The following table summarizes total revenue from customers by geographic region. Product revenues are attributed to countries based on ship-to location.
Three months ended March 31,
(In thousands)20202019
United States$326,885  $162,043  
Outside of United States20,936  —  
Total revenues$347,821  $162,043