Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
A. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)
3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]  
Product warranties
    March 31,
2019
    December 31,
2018
 
Beginning balance   $ 46,103     $ 59,982  
Warranty claims incurred     (11,194 )     (28,000 )
Provision charged to expense     4,826       14,211  
Ending balance   $ 39,736     $ 46,103