Segment Information (Tables)
6 Months Ended
Jun. 30, 2019
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]  
Revenue by Geographic Area

 

 

Three Month Period Ended

June 30, 2019

 

Three Month Period Ended

June 30, 2018

 

Six Month Period Ended

June 30, 2019

 

Six Month Period Ended

June 30, 2018

 

 

 

 

 

 

 

 

 

 

 

Asia

 

$        21,314

 

$       27,043

 

$       43,731

 

$       50,268

 

Europe

 

12,364

 

4,465

 

21,779

 

11,157

 

Total Revenue

 

$       33,678

 

$      31,508

 

$       65,510

 

$      61,425