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Right of Use Leases Assets and Leases Obligations (Tables)
 6 Months Ended
Jun. 30, 2020
Disclosure Text Block [Abstract]  
Schedule of operating lease assets and liabilities
   June 30,
2020		   December 31,
2019		 
   US$
thousands		   US$
thousands		 
         
Operating lease assets  $530   $634 
           
Operating lease liabilities:          
Current operating lease liabilities  $236   $239 
Non-current operating lease liabilities  $335   $450 
Total operating lease liabilities  $571   $689 
Schedule of weighted average remaining lease term and weighted average discount rate for operating leases
   June 30,
2020		 
Weighted average remaining lease term (years)   3.0 
Weighted average discount rate   6.0%
Schedule of future minimum lease payments under non-cancellable operating leases
   US$
thousands		 
     
July 1, 2020 through December 31, 2020   261 
2021   140 
2022   140 
2023   82 
2024   - 
Thereafter   - 
Total undiscounted future minimum lease payments   623 
Less: portion representing imputed interest   (52)
Total undiscounted future minimum lease payments   571