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Inventories
3 Months Ended
Mar. 31, 2015
Inventory Disclosure [Abstract]  
Inventory Disclosure
Inventories

Inventories consisted of the following (in thousands):
 
March 31,
2015
 
December 31,
2014
Raw materials
$
8,458

 
$
9,219

Work-in-process
681

 
1,195

Finished goods
9,251

 
10,762

 
18,390

 
21,176

Less: inventory valuation allowance
(2,663
)
 
(2,701
)
Inventories, net
$
15,727

 
$
18,475



Consigned inventory is held at third-party locations, which include the Company's contract manufacturing partner and customers. The Company retains title to the inventory until purchased by the third-party. Consigned inventory, consisting of raw materials and finished goods was $2.1 million and $2.6 million at March 31, 2015 and December 31, 2014.

The Company recorded the following charges associated with the valuation of inventory and the adverse purchase commitment liability (in thousands):
 
Three Months Ended
 
 
March 31,
 
 
2015
 
2014
 
Inventory, net
$
(40
)
 
$
1,162

 
Adverse purchase commitments
576

 
(127)