Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

15. Trade and Other Receivables (Tables)

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15. Trade and Other Receivables (Tables)
12 Months Ended
Dec. 31, 2017
Trade And Other Receivables Tables  
Schedule of Trade and other receivables

Trade and other receivables consist of the following at December 31:

 

    2017     2016     2015  
Trade receivables   $ 136,224     $ 154,642     $ 686,745  
Less: bad debt provision     (54,303 )     (50,426 )     (488,978 )
Trade receivables, net     81,921       104,216       197,767  
Other receivables (taxes receivable, unbilled revenue and maintenance charges)     325,089       652,724       645,112  
Total trade and other receivables, net current portion   $ 407,010     $ 756,940     $ 842,879  
Other receivables - taxes receivables   $     $ 143,137     $  
Total trade and other receivables, net non-current portion   $     $ 143,147     $  
Schedule of bad debt provision

Details of the Group’s bad debt provision at December 31 are as follows:

 

    2017     2016     2015  
At January 1   $ 50,426     $ 488,978     $ 521,111  
Provided during the year     40,022             29,313  
Receivable written off during the year as uncollectible     (30,846 )     (35,612 )     (19,092 )
Unused amount reversed     (12,323 )     (389,116 )     (30,840 )
Currency exchange rate and other adjustment     7,024       (13,824 )     (11,514 )
At December 31   $ 54,303     $ 50,426     $ 488,978