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

15. Trade and Other Receivables (Details - Bad debt provision)

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15. Trade and Other Receivables (Details - Bad debt provision) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Trade And Other Receivables Details - Bad Debt Provision      
Beginning balance $ 50,426 $ 488,978 $ 521,111
Provided during the year 40,022 0 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)
Ending balance $ 54,303 $ 50,426 $ 488,978