Note 4 - Net Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finished goods	$ 32,550	$ 24,200
Work in process	41,358	27,640
Raw materials	30,830	28,558
Supplies	5,182	5,232
Total	$ 109,920	$ 85,630