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Inventories
3 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories:

Inventories are stated at the lower of cost (first‑in, first‑out) or market and include material, labor and manufacturing overhead. When required, provisions are made to reduce excess and obsolete inventories to their estimated net realizable value. Inventories consist of the following (in thousands):
 
March 31,
2016
 
December 31,
2015
 
 
 
 
Purchased materials
$
182

 
$
164

Finished goods
3,145

 
2,729

 
$
3,327

 
$
2,893