| Summary of property, plant and equipment |
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March 31,
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December 31,
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2018
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2017
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Land
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$
|
2,378
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$
|
2,378
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Land improvements
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|
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4,357
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|
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4,357
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Leasehold Improvements
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|
|
4,288
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|
4,183
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Buildings
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|
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26,920
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|
26,846
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Machinery and equipment
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|
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44,892
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|
|
44,618
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Furniture and fixtures
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|
|
14,011
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|
|
13,681
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Mobile equipment and other
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|
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4,640
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|
|
4,576
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Construction-in-process
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|
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4,229
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|
|
4,320
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Total property, plant and equipment
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|
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105,715
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104,959
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Less accumulated depreciation
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(52,801)
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(50,997)
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Net property, plant and equipment
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$
|
52,914
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$
|
53,962
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