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Segment Information (Tables)
 3 Months Ended
Mar. 31, 2017
Segment Reporting [Abstract]  
Schedule of Revenue by Geographic Region

 

 

 

 

 

 

 

 

 

    

Three Months Ended

 

 

 

March 31, 

 

(in thousands)

    

2017

    

2016

    

Revenue

 

 

 

 

 

 

 

United States

 

$

20,091

 

$

18,405

 

International

 

 

22,197

 

 

19,602

 

Total

 

$

42,288

 

$

38,007