Note 2 - Inventory - Carrying Values of Inventory (Details) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Finished goods | $ 21,390 | $ 35,517 |
| Work in process | 1,538 | 1,695 |
| Raw materials and supplies | 26,677 | 31,247 |
| Inventory, gross | 49,605 | 68,459 |
| LIFO reserve | (1,657) | (3,502) |
| Total inventory | $ 47,948 | $ 64,957 |