Property, plant and equipment is summarized as follows (in thousands): | | | December 31, | | | | | 2017 | | 2016 | | | Building and improvements | | $ | 1,273 | | $ | 1,273 | | | Scientific equipment | | | 598 | | | 598 | | | Computer hardware and software | | | 107 | | | 109 | | | Machinery and equipment | | | 275 | | | 568 | | | Land and improvements | | | 162 | | | 162 | | | Other personal property | | | 70 | | | 70 | | | Office equipment | | | 27 | | | 27 | | | | | | 2,512 | | | 2,807 | | | Less: impairment reserve | | | - | | | (82) | | | Less: accumulated depreciation | | | (1,833) | | | (1,858) | | | Total property, plant and equipment, net | | $ | 679 | | $ | 867 | |
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