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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