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6. Leases (Details - Future lease payments) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
2021 $ 132  
2022 135  
2023 140  
2024 35  
Total lease payments 442  
Less: Imputed interest (31)  
Total operating lease liabilities (includes current portion) $ 411 $ 518