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Segment Reporting (Tables)
3 Months Ended
Mar. 31, 2021
Segment Reporting [Abstract]  
Reportable Revenues by Geographic Regions
Revenues by geographic regions are based upon the customers’ ship-to address for product revenue and the region of testing for testing services revenue. The following table summarizes reportable revenues by geographic regions (in thousands):

Three Months Ended March 31,
20212020
Testing services revenue
United States$59,021 $31,329 
Rest of World260 113 
$59,281 $31,442 
Product revenue
United States$2,495 $2,061 
Europe2,252 2,002 
Rest of World1,031 632 
$5,778 $4,695 
Digital and other revenue
United States$2,288 $2,183 
Europe31 30 
Rest of World22 30 
$2,341 $2,243 
Total United States$63,804 $35,573 
Total Europe$2,283 $2,032 
Total Rest of World$1,313 $775 
Total$67,400 $38,380 
Long-Lived Assets Consisting of Property and Equipment, Net by Geographic Regions
The following table summarizes long-lived assets, consisting of property and equipment, net, by geographic regions (in thousands):
March 31, 2021December 31, 2020
Long-lived assets:
United States$10,700 $9,888 
Europe302 351 
Rest of World396 465 
Total$11,398 $10,704