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Segment information (Tables)
6 Months Ended
Jun. 30, 2019
Segment Reporting [Abstract]  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas
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