Note 3 - Net Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finished goods	$ 30,086	$ 32,550
Work in process	61,742	41,358
Raw materials	34,455	30,830
Supplies	5,324	5,182
Total	$ 131,607	$ 109,920