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Note 12 - Share-based Compensation
3 Months Ended
Mar. 31, 2020
Notes to Financial Statements  
Share-based Payment Arrangement [Text Block]
12.
Share-based compensation
 
During the
three
months ended
March 31, 2020,
the Company granted a total of
381,301
share options and
3,293
restricted shares, respectively.
 
The following table summarizes total share-based compensation expense recognized for the
three
months ended
March 31, 2019
and
2020:
 
    Three months ended March 31,  
    2019     2020  
    $     $  
    (Unaudited)     (Unaudited)  
             
Research and development    
156
     
3,183
 
Selling, general and administrative    
215
     
287
 
                 
Total    
371
     
3,470