Cash and Cash Equivalents (Tables)
 12 Months Ended
Dec. 31, 2013
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents
 
 
As of December 31,
 
 
 
2013
 
2012
 
Cash denominated in U.S. dollars
 
$
24,628
 
$
34,386
 
Money market funds denominated in U.S. dollars
 
 
3,184
 
 
22,352
 
Cash in currency other than U.S. dollars
 
 
5,774
 
 
222
 
 
 
$
33,586
 
$
56,960