XML 49 R30.htm IDEA: XBRL DOCUMENT v3.8.0.1
ALLOWANCE FOR DOUBTFUL ACCOUNTS (Tables)
 12 Months Ended
Dec. 31, 2017
ALLOWANCES FOR DOUBTFUL RECEIVABLES [Abstract]  
Schedule of Allowances for Doubtful Accounts
Analysis of allowances for doubtful accounts is as follows:
   
 
 
Year ended December 31,
 
 
 
2015
 
2016
 
2017
 
Beginning of the year
 
$
3,189,110
 
$
1,087,465
 
$
10,163
 
Reversal during the year
 
 
(2,026,567)
 
 
(1,053,041)
 
 
(2,750)
 
Foreign exchange effect
 
 
(75,078)
 
 
(24,261)
 
 
580
 
Closing balance
 
$
1,087,465
 
$
10,163
 
$
7,993