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Note 4 - Accounts Receivable, Net
 12 Months Ended
Dec. 31, 2020
Notes to Financial Statements  
Accounts Receivable Disclosure [Text Block]
4.
 Accounts receivable, net
 
    As of December 31,
    2020   2019
    US$('000)   US$('000)
         
Accounts receivable    
6,654
      
6,408
  
Allowance for doubtful accounts    
(4,247
 )    
(3,148
 )
Accounts receivable, net    
2,407
      
3,260
  
 
All of the accounts receivable are non-interest bearing. Based on the assessment of the collectability of the accounts receivable as of
December 31, 2020
and
2019,
the Company provided approximately
US$4.25
million and
US$3.15
million allowance for doubtful accounts, respectively, which were primarily related to the accounts receivable of the Company's internet advertising and related services business segment with an aging over
six
months. The Company evaluates its accounts receivable with an aging over
six
months and determines the allowance based on aging data, historical collection experience, customer specific facts and economic conditions. For the years ended
December 31, 2020
and
2019,
approximately
US$0.83
million and
US$2.34
million allowance for doubtful accounts was provided, respectively.