Quarterly report pursuant to Section 13 or 15(d)

A. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)

v3.5.0.2
A. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Net income $ (671,626) $ 523,511 $ (551,504) $ (220,567)    
Cash used in operating activities     (326,499) $ (508,073)    
Accumulated deficit (122,646,625)   (122,646,625)   $ (122,095,121)  
Working capital 468,690   $ 468,690      
Line of credit interest rate description     Prime rate plus 3.00%      
Line of credit maturity date     Sep. 30, 2018      
Line of credit balance 536,771   $ 536,771   901,771  
Line of credit remaining borrowing capacity 979,000   979,000   532,700  
Restricted cash on deposit 0   $ 0   31,277  
Shares excluded from EPS calculation     1,940,225 9,745,758    
Accounts receivable 2,772,498   $ 2,772,498   $ 2,263,347  
Guarantees and product warranty return percentage     1% to 3%   1% to 3%  
Warranty liabilities 87,208   $ 87,208   $ 66,555 $ 44,288
Revenues not billed [Member]            
Accounts receivable $ 385,000   $ 385,000   $ 170,000