Note 5 - Net Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finished goods	$ 29,117	$ 32,550
Work in process	54,463	41,358
Raw materials	33,841	30,830
Supplies	5,763	5,182
Total	$ 123,184	$ 109,920