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Inventory (Tables)
 9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory
Our inventory, net of allowance for obsolescence of $16,458 and $15,000 at September 30, 2017 and December 31, 2016, respectively, consisted of the following amounts:
 
September 30, 2017
 
December 31, 2016
 
(in thousands)
Raw materials
$
20,860

 
$
18,365

Finished Goods
1,007

 
2,558

Work in process
6,512

 
4,910

 
$
28,379

 
$
25,833