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5. Patents (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]                    
Estimated useful lives                 4 years  
2021 $ 4,450               $ 4,450  
2022 4,451               4,451  
2023 4,376               4,376  
2024 3,005               3,005  
2025 630               630  
Impairment of intangible assets $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 0 $ 0
Accelerated amortization of patents                 $ 0 $ 0