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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES      
Bad Debt Expense $ 58,490 $ 0  
Allowance for doubtful accounts 195,000 300,000  
Warranty reserve $ 30,000 $ 30,000  
Potentially dilutive securities, convertible debentures 9,259,250 11,111,100  
Potentially dilutive securities, outstanding warrants 26,800,611 35,251,411  
Potentially dilutive securities, outstanding options 620,000 320,000  
Potentially dilutive securities, convertible Series A preferred stock 510,000 510,000  
Advertising and promotional expenses $ 40,000 $ 54,000  
Research and Development Expenses 92,577 132,487  
Shipping and Handling Costs $ 39,000 $ 51,000  
Accounts Receivable [Member] | Two Customers [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES      
Concentration Risk, Percentage 41.00%   37.00%
Revenue, Net [Member] | Two Customers [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES      
Concentration Risk, Percentage 45.00% 33.00%  
Accounts Payable [Member] | Two Customers [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES      
Concentration Risk, Percentage 40.00% 63.00%