Annual report pursuant to Section 13 and 15(d)

A. SUMMARY OF ACCOUNTING POLICIES (Tables)

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A. SUMMARY OF ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]  
Product warranties
    2015     2014  
Beginning balance   $ 44,288     $ 77,943  
Warranty claims incurred     (52,833 )     (45,710 )
Provision charged to expense     75,100       12,055  
Ending balance   $ 66,555     $ 44,288