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VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
VALUATION AND QUALIFYING ACCOUNTS
Description
 
Balance at Beginning of Year
 
Additions
Charged
(Credited) to Costs and Expenses
 
Adjustments/Deductions
 
 
 
Balance at
End of Year
Year ended December 31, 2018
 
 
 
 
 
 
 
 
 
 
Allowance for doubtful accounts
 
$
431

 
$
43

 
$
136

 
(a) 
 
$
610

Inventory reserve
 
2,315

 
898

 
(638
)
 
(a) 
 
2,575

 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
Allowance for doubtful accounts
 
$
489

 
$
126

 
$
(184
)
 
(a) 
 
$
431

Inventory reserve
 
2,546

 
538

 
(769
)
 
(a) 
 
2,315

 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
Allowance for doubtful accounts
 
$
235

 
$
417

 
$
(163
)
 
(a) 
 
$
489

Inventory reserve
 
1,823

 
905

 
(182
)
 
(a) 
 
2,546


(a) 
represents write-offs and other adjustments