|
Property, plant and equipment (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Property, plant and equipment | ||
| Total property, plant and equipment | $ 48,535 | $ 47,860 |
| Less accumulated depreciation | (28,289) | (26,520) |
| Net property, plant and equipment | 20,246 | 21,340 |
|
Land
|
||
| Property, plant and equipment | ||
| Total property, plant and equipment | 960 | 960 |
|
Land improvements
|
||
| Property, plant and equipment | ||
| Total property, plant and equipment | 1,768 | 1,768 |
|
Buildings
|
||
| Property, plant and equipment | ||
| Total property, plant and equipment | 12,852 | 12,660 |
|
Machinery and equipment
|
||
| Property, plant and equipment | ||
| Total property, plant and equipment | 23,801 | 23,253 |
|
Furniture and fixtures
|
||
| Property, plant and equipment | ||
| Total property, plant and equipment | 7,300 | 7,255 |
|
Mobile equipment and other
|
||
| Property, plant and equipment | ||
| Total property, plant and equipment | 1,227 | 1,216 |
|
Construction-in-process
|
||
| Property, plant and equipment | ||
| Total property, plant and equipment | $ 627 | $ 748 |