| Summary of property, plant and equipment |
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March 31,
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December 31,
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2019
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2018
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Land
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$
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2,378
|
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$
|
2,378
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Land improvements
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4,450
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4,357
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Leasehold improvements
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|
|
4,087
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|
4,079
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Buildings
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28,616
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28,238
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Machinery and equipment
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|
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50,703
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50,129
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Furniture and fixtures
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|
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16,457
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16,360
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Mobile equipment and other
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|
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4,883
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|
|
4,883
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Construction-in-process
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|
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2,545
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|
|
3,084
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Total property, plant and equipment
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|
|
114,119
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113,508
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Less accumulated depreciation
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(60,302)
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(58,313)
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Net property, plant and equipment
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$
|
53,817
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$
|
55,195
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