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3. Summary of Significant Accounting Policies (Details Narrative) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]      
Cash equivalents $ 0 $ 0  
Allowance against notes receivable 0 0  
Uncertain tax positions 0 0 $ 0
Restricted cash 900 239 458
Advance from customers 17,161 8,159 $ 11,365
Bitcoin balance $ 0 $ 0