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Note 2 - Variable Interest Entities (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Variable Interest Entities [Table Text Block]
    As of December 31,
    2020   2019
    US$('000)   US$('000)
Assets                
Current assets:                
Cash and cash equivalents   $
277
    $
699
 
Accounts receivable, net    
1,142
     
2,876
 
Prepayment and deposit to suppliers    
2,818
     
3,998
 
Due from related parties, net    
61
     
81
 
Other current assets, net    
10
     
6
 
Total current assets    
4,308
     
7,660
 
                 
Long-term investments    
67
     
35
 
Operating lease right-of-use assets    
48
     
12
 
Property and equipment, net    
32
     
40
 
Intangible assets, net    
9
     
25
 
Deferred tax assets    
536
     
713
 
Total Assets   $
5,000
    $
8,485
 
                 
Liabilities                
Current liabilities:                
Short-term bank loan   $
-
    $
430
 
Accounts payable    
270
     
408
 
Advances from customers    
1,436
     
2,006
 
Accrued payroll and other accruals    
168
     
132
 
Taxes payable    
2,755
     
2,568
 
Operating lease liabilities    
18
     
-
 
Lease payment liabilities related to short-term leases    
108
     
19
 
Other current liabilities    
213
     
84
 
Total current liabilities    
4,968
     
5,647
 
                 
Operating lease liabilities-Non current    
32
     
-
 
Total Liabilities   $
5,000
    $
5,647
 
Financial Performance of VIEs [Table Text Block]
    Year Ended December 31,
    2020   2019
    US$('000)   US$('000)
                 
Revenues   $
34,418
    $
56,172
 
Cost of revenues    
34,637
     
52,582
 
Total operating expenses    
1,635
     
4,652
 
Net loss before allocation to noncontrolling interests    
2,092
     
929