Annual report pursuant to Section 13 and 15(d)

A. SUMMARY OF ACCOUNTING POLICIES (Details Narrative)

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A. SUMMARY OF ACCOUNTING POLICIES (Details Narrative) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounting Policies [Abstract]      
Cash $ 4,678,891    
Accumulated deficit (123,171,406) $ (119,724,656)  
Net Cash Used In Operating Activities (3,945,742) (3,077,664)  
Line of credit remaining borrowing capacity 500,000    
Allowance for doubtful accounts $ 65,542 22,173 $ 34,573
Property and equipment useful lives 2 to 10 years    
Impairment on long-lived assets $ 0 $ 0  
Shares excluded from EPS calculation (antidilutive shares) 3,599,793 4,626,474  
Tax Cut and Jobs Act impact $ 0 $ 12,721,278  
Change in valuation allowance for deferred tax assets 658,650 (13,710,944)  
Increase in tax expense   700,000  
Provision for Income Taxes $ 9,623 $ 9,762  
Effective income tax rate 0.30% 0.30%  
Guarantees and product warranty return percentage 1% to 3% 1% to 3%  
Advertising expense $ 108,632 $ 33,520  
Research and development expenses 1,879,676 1,770,597  
Stock based compensation expenses 6,404 322,888  
Warranty liabilities $ 46,103 $ 59,892 $ 95,540