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Inventories
 12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories INVENTORIES
Inventories at December 31 consisted of the following (in thousands):
 
2019
 
2018
Raw material
$
45,700

 
$
57,845

Work-in-process
5,988

 
6,930

Finished goods
26,788

 
34,138

Total inventories
$
78,476

 
$
98,913


The following table summarizes activity recorded within the reserve for excess, obsolete and slow moving inventory for the years ended December 31 (in thousands):
 
2019
 
2018
 
2017
Beginning balance
$
4,172

 
$
3,695

 
$
3,801

Excess, obsolete and slow moving inventory expense
659

 
729

 
1,276

Scrapped inventory and other adjustments
(639
)
 
(252
)
 
(1,382
)
Ending balance
$
4,192

 
$
4,172

 
$
3,695