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8. INTANGIBLE ASSETS (Details) - Estimate of Aggregate Amortization Expense for the years ending December 31,: - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Estimate of Aggregate Amortization Expense for the years ending December 31,: [Abstract]          
2017         $ 127,612
2018       $ 121,468  
2019     $ 113,484    
2020   $ 110,578      
2021 $ 110,578