Note 3 - Net Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Finished goods	$ 34,956	$ 32,550
Work in process	67,375	41,358
Raw materials	32,105	30,830
Supplies	5,700	5,182
Total	$ 140,136	$ 109,920