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Right of Use Leases Assets and Leases Obligations (Tables)
 6 Months Ended
Jun. 30, 2019
Leases [Abstract]  
Schedule of operating lease assets and liabilities
   June 30,
2019		   December 31,
2018		 
   US$
thousands		   US$
thousands		 
         
Operating lease assets  $685   $- 
           
Operating lease liabilities:          
Current operating lease liabilities  $216   $- 
Non-current operating lease liabilities  $516   $- 
Total operating lease liabilities  $732   $- 
Schedule of weighted average remaining lease term and weighted average discount rate for operating leases
   June 30,
2019		 
Weighted average remaining lease term (years)   3.7 
Weighted average discount rate   6.0%
Schedule of future minimum lease payments under non-cancelable operating leases
   US$
thousands		 
     
July 1, 2019 through December 31, 2019   275 
2020   261 
2021   136 
2022   136 
2023   80 
Thereafter   - 
Total undiscounted future minimum lease payments   888 
Less: portion representing imputed interest   (155)
 Total undiscounted future minimum lease payments   733