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5. Leases (Details - Future lease payments) - USD ($)
$ in Thousands
Dec. 31, 2019
Jan. 02, 2019
Leases [Abstract]    
2020 $ 128  
2021 132  
2022 135  
2023 139  
2024 35  
Total undiscounted lease payments 569  
Less: Effects of discounting (51)  
Total operating lease liabilities $ 518 $ 28