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Property, Plant and Equipment, Net | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment, Net | Property, Plant and Equipment, Net Property, plant and equipment consist of the following:
| December 31,
| 2020 |  | 2019
Land and land improvements | $ | 9,844 |  |  | $ | 9,814 |
Buildings and building improvements | 12,088 |  |  | 11,765 |
Furniture and fixtures | 1,228 |  |  | 1,025 |
Equipment | 31,150 |  |  | 33,707 |
Leasehold improvements | 6,260 |  |  | 6,607 |
Breeding stock | 868 |  |  | 5,191 |
Computer hardware and software | 5,684 |  |  | 6,877 |
Construction and other assets in progress | 2,754 |  |  | 5,229 |
| 69,876 |  |  | 80,215 |
Less: Accumulated depreciation and amortization | (34,952) |  |  | (36,263) |
Property, plant and equipment, net | $ | 34,924 |  |  | $ | 43,952 |
Depreciation expense was $7,449, $8,222 and $8,946 for the years ended December 31, 2020, 2019 and 2018, respectively. During the year ended December 31, 2020, the Company recorded impairment losses of $920, which is included in impairment of other noncurrent assets on the accompanying consolidated statement of operations, primarily related to right-of-use assets at certain of the Company's leased locations. During the year ended December 31, 2019, the Company recorded impairment losses of $448, which is included in impairment of other noncurrent assets on the accompanying consolidated statement of operations, related to the impairment of property, plant and equipment in conjunction with the closing of two of its operating units during the third quarter of 2019.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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