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INVENTORIES
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES
The components of inventories, net are as follows (in thousands):
 
December 31,
 
2018
 
2017
Raw materials
$
19,193

 
$
16,500

Work-in-process
9,711

 
8,371

Finished goods
19,665

 
16,540

  Total
$
48,569

 
$
41,411


The Company is required to perform ongoing stability testing on select lots of EXPAREL at various time intervals. In October 2016, as part of its ongoing stability testing, the Company identified that a single batch of EXPAREL, which was manufactured in early 2016, did not meet the required specification. An internal investigation tied this unexpected result to a modification in the manufacturing process that existed when this product was made, which has subsequently been corrected. The Company reserved all impacted inventory on hand and recorded a $20.7 million charge to cost of goods sold in 2016 related to this matter.