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1. Basis of Presentation and Summary of Significant Accounting Policies (Details 2) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Cash $ 13,746,445 $ 4,187,450 $ 11,297 $ 1,291,317
Notes receivable 9,000,000 11,400,000    
Level 1        
Cash 13,746,445 4,187,450    
Level 2        
Notes receivable 8,990,279 11,409,709    
Accounts receivable $ 19,646,917 $ 28,201,279