| Summary of property, plant and equipment |
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June 30,
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December 31,
|
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2018
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2017
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|
|
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Land
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|
$
|
2,378
|
|
$
|
2,378
|
|
Land improvements
|
|
|
4,357
|
|
|
4,357
|
|
Leasehold improvements
|
|
|
4,313
|
|
|
4,183
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Buildings
|
|
|
27,116
|
|
|
26,846
|
|
Machinery and equipment
|
|
|
47,195
|
|
|
44,618
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Furniture and fixtures
|
|
|
14,175
|
|
|
13,681
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Mobile equipment and other
|
|
|
4,677
|
|
|
4,576
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Construction-in-process
|
|
|
4,457
|
|
|
4,320
|
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Total property, plant and equipment
|
|
|
108,668
|
|
|
104,959
|
|
Less accumulated depreciation
|
|
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(54,542)
|
|
|
(50,997)
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Net property, plant and equipment
|
|
$
|
54,126
|
|
$
|
53,962
|
|