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Note 8 - Inventories
6 Months Ended
Jun. 30, 2016
Notes to Financial Statements  
Inventory Disclosure [Text Block]
8.
Inventories
Inventories consist of the following:
 
    June 30,   December 31,
    2016   2015
Raw materials   $ 6,812     $ 5,780  
Work-in-process     6,140       5,656  
Finished goods     4,312       3,502  
Total   $ 17,264     $ 14,938  
 
Inventories are stated at the lower of cost or market, with cost being determined using the first-in, first-out method. Work-in-process and finished goods inventories include materials, labor, and manufacturing overhead. Inventory costs associated with product candidates that have not yet received regulatory approval are capitalized if the Company believes there is probable future commercial use and future economic benefit.