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Cash and Cash Equivalents (Tables)
 12 Months Ended
Dec. 31, 2018
CASH AND CASH EQUIVALENTS [Abstract]  
Cash and cash equivalents

 

December 31,
2018

 

December 31,
2017

 

Cash and cash equivalents

$               58,590 

$               24,047 

Restricted cash

                   2,865 

                   5,886 

 

 

 

Total cash and cash equivalents and restricted cash

$               61,455 

$               29,933