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Restricted cash (Tables)
12 Months Ended
Dec. 31, 2018
Cash and Cash Equivalents [Abstract]  
Restrictions on Cash and Cash Equivalents [Table Text Block]
 
 
December 31,
 
 
December 31,
 
 
 
2018
 
 
2017
 
 
 
 
$
 
 
 
$
 
Financial product
 
 
5,594,200
 
 
 
-
 
Security deposit
 
 
36,898,661
 
 
 
21,837,690
 
Time deposit
 
 
1,733,757
 
 
 
3,982,226
 
Government subsidy deposit
 
 
269,015
 
 
 
134,030
 
 
 
 
44,495,633
 
 
 
25,953,946