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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Property, plant and equipment |  |
Property, plant and equipment, gross | $ 13,238 | $ 13,384
Less: accumulated depreciation and amortization | 6,074 | 5,603
Property, plant and equipment net, excluding land | 7,164 | 7,781
Land | 134 | 134
Property, plant and equipment, net | 7,298 | 7,915
Buildings and improvements |  |
Property, plant and equipment |  |
Property, plant and equipment, gross | $ 7,972 | 8,083
Buildings and improvements | Minimum |  |
Property, plant and equipment |  |
Property, plant and equipment, Estimated Useful Lives (years) | 15 years |
Buildings and improvements | Maximum |  |
Property, plant and equipment |  |
Property, plant and equipment, Estimated Useful Lives (years) | 25 years |
Office equipment and furniture |  |
Property, plant and equipment |  |
Property, plant and equipment, gross | $ 2,135 | 2,126
Office equipment and furniture | Minimum |  |
Property, plant and equipment |  |
Property, plant and equipment, Estimated Useful Lives (years) | 2 years |
Office equipment and furniture | Maximum |  |
Property, plant and equipment |  |
Property, plant and equipment, Estimated Useful Lives (years) | 7 years |
Automobiles and trucks |  |
Property, plant and equipment |  |
Property, plant and equipment, gross | $ 157 | 118
Automobiles and trucks | Minimum |  |
Property, plant and equipment |  |
Property, plant and equipment, Estimated Useful Lives (years) | 2 years |
Automobiles and trucks | Maximum |  |
Property, plant and equipment |  |
Property, plant and equipment, Estimated Useful Lives (years) | 5 years |
Machinery and shop equipment |  |
Property, plant and equipment |  |
Property, plant and equipment, gross | $ 2,951 | 2,963
Machinery and shop equipment | Minimum |  |
Property, plant and equipment |  |
Property, plant and equipment, Estimated Useful Lives (years) | 2 years |
Machinery and shop equipment | Maximum |  |
Property, plant and equipment |  |
Property, plant and equipment, Estimated Useful Lives (years) | 10 years |
Construction in Progress |  |
Property, plant and equipment |  |
Property, plant and equipment, gross | $ 23 | $ 94

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