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Cash and Cash Equivalents (Tables)
 12 Months Ended
Dec. 31, 2015
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents
 
 
As of December 31,
 
 
 
2015
 
2014
 
Cash denominated in U.S. dollars
 
$
24,918
 
$
2,897
 
Money market funds denominated in U.S. dollars
 
 
—
 
 
13,085
 
Cash in currency other than U.S. dollars
 
 
33
 
 
41
 
 
 
$
24,951
 
$
16,023