Quarterly report pursuant to Section 13 or 15(d)

A. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)

v3.19.3
A. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)
9 Months Ended
Sep. 30, 2019
Accounting Policies [Abstract]  
Product warranties
    September 30,
2019
    December 31,
2018
 
Beginning balance   $ 46,103     $ 59,892  
Warranty claims incurred     (36,373 )     (28,000 )
Provision charged to expense     20,584       14,211  
Ending balance   $ 30,314     $ 46,103