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Note 11 - Supplemental Balance Sheet Information (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Other Current Liabilities [Table Text Block]
    As of December 31,     As of March 31,  
    2019     2020  
    $     $  
         
(Unaudited)
 
                 
Compensation related    
226
     
207
 
Professional services    
-
     
543
 
Other taxes related    
798
     
810
 
Other    
65
     
125
 
                 
Total    
1,089
     
1,685