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Trade Accounts Receivable, Net
 12 Months Ended
Dec. 31, 2011
Trade Accounts Receivable, Net (Abstract)  
Trade Accounts Receivable, Net
17.           Trade Accounts Receivable, Net
 
The amounts in the accompanying consolidated balance sheets are analyzed as follows:
 
 
 
 
 
 
 
  
 
 
2010
 
 
 
2011
 
Trade accounts receivable
 
$
4,652
 
 
$
7,901
 
Allowance for doubtful debts
 
 
-
 
 
 
(3,139
)
Total Accounts Receivable, Net
 
$
4,652
 
 
$
4,762
 
 
The movement in the allowance for doubtful debts is analyzed as follows:
 
 
 
 
 
 
 
  
 
 
2010
 
 
 
2011
 
Balance as at January 1
 
$
-
 
 
$
-
 
Bad debt expense
 
 
2,131
 
 
 
3,139
 
Less: Amount written off during the year
 
 
(2,131
)
 
 
-
 
Balance as at December 31
 
$
-
 
 
$
3,139