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ACCRUED WARRANTY (Tables)
 9 Months Ended
Sep. 30, 2017
Product Warranties Disclosures [Abstract]  
Accrued Warranty
Changes in the accrued warranty for the nine months ended September 30, 2017 are as follows:
Balance, December 31, 2016
$
518,000

Additions
83,000

Claims
(16,000
)
Balance, September 30, 2017
$
585,000