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ACCOUNTS RECEIVABLE (Tables)
 6 Months Ended
Jun. 30, 2012
Accounts Receivable, Net [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accounts receivable comprised the following at June 30, 2012 and December 31, 2011:

 
June 30, 2012

 
December 31, 2011

Unrelated customers
$
217,002

 
$
204,747

Less: allowance for bad debts and credit notes
(16,336
)
 
(13,555
)
Related parties
1,173

 
1,020

Less: allowance for bad debts and credit notes
(116
)
 
(55
)
Total accounts receivable
$
201,723

 
$
192,157