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Segment information
6 Months Ended
Jun. 30, 2019
Segment Reporting [Abstract]  
Segment information
Segment information
The Company identifies operating segments as components of an entity for which discrete financial information is available and is regularly reviewed by the chief operating decision maker(s) in making decisions regarding resource allocation and performance assessment. The Company defines the term “chief operating decision makers” to be its chief executive officer and its president. The Company has determined it operates in one operating segment and one reportable segment, as its chief operating decision makers review financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance.

Revenue by country is based on the billing address of the customer. For the three and six months ended June 30, 2019 and 2018, revenue by geographic area was as follows:
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(In thousands)
 
2019
 
2018
 
2019
 
2018
United States
 
$
62,644

 
$
50,858

 
$
122,121

 
$
102,833

International
 
7,916

 
6,077

 
15,000

 
10,091

Revenue
 
$
70,560

 
$
56,935

 
$
137,121

 
$
112,924



Revenue derived from customers in individual countries other than the United States did not exceed 10% of total revenue for the periods presented. All significant long-lived assets are located in the United States.