Note 3 - Net Inventories - Net Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Finished goods	$ 37,883	$ 32,550
Work in process	67,842	41,358
Raw materials	32,341	30,830
Supplies	5,821	5,182
Total	$ 143,887	$ 109,920