Note 7 - Property, Plant, and Equipment (Details) - Property, Plant, and Equipment Summary - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Property, Plant, and Equipment Summary [Abstract] | ||
| Land and land improvements | $ 5,741 | $ 5,741 |
| Buildings and building equipment | 26,478 | 26,524 |
| Machinery and equipment | 157,289 | 152,792 |
| Construction in progress | 3,586 | 1,186 |
| Accumulated depreciation | (68,764) | (58,872) |
| Total | $ 124,330 | $ 127,371 |