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7. SEGMENT REPORTING (Tables)
3 Months Ended
Mar. 31, 2019
Segment Reporting [Abstract]  
Segment reporting
   Three Months Ended March 31,
   Direct Sales  Distributor Sales  Total
   2019  2018  2019  2018  2019  2018
                   
Sales, net  $1,720,177   $1,550,155   $3,278,609   $2,982,464   $4,998,786   $4,532,619 
Cost of Sales   343,439    388,184    1,374,711    1,254,191    1,718,150    1,642,375 
Gross Margin   1,376,738    1,161,971    1,903,898    1,728,273    3,280,636    2,890,244 
Selling Expenses   1,074,371    986,752    552,668    450,303    1,627,039    1,437,055 
Contribution Margin  $302,367   $175,219   $1,351,230   $1,277,970   $1,653,597   $1,453,189 
Percent of Sales   34.4%   34.2%   65.6%   65.8%   100.0%   100.0%