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17. REVENUES (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Schedule of revenues

For each of the identified periods, revenues can be categorized into the following:

 

    For the year ended December 31,  
    2020     2019  
Product sales   $ 6,132,447     $ 5,091,571  
Maintenance fees     30,957       13,055  
Professional services     57,506       6,919  
Discounts and allowances     (10,560 )      
Total revenues   $ 6,210,350     $ 5,111,545