Quarterly report pursuant to Section 13 or 15(d)

A. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details-Product warranties)

v3.8.0.1
A. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details-Product warranties) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Product warranties    
Beginning balance $ 95,540 $ 66,555
Warranty claims incurred (48,767) (115,120)
Provision charged to expense 31,037 144,105
Ending balance $ 77,810 $ 95,540