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Property, Plant and Equipment | 3 Months Ended
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Mar. 31, 2021
Property Plant And Equipment [Abstract] |
Property, Plant and Equipment | 9. PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consisted of the following:
|  | As of March 31, |  |  | As of December 31, |
(In thousands) |  | 2021 |  |  | 2020 |
Land |  | $ | 4,575 |  |  | $ | 4,575 |
Building and land improvements |  |  | 35,154 |  |  |  | 35,142 |
Building |  |  | 68,167 |  |  |  | 68,169 |
Furniture and fixtures |  |  | 19,946 |  |  |  | 19,965 |
Computer hardware and software |  |  | 70,889 |  |  |  | 70,942 |
Engineering and other equipment |  |  | 133,065 |  |  |  | 132,920 |
Total property, plant and equipment |  |  | 331,796 |  |  |  | 331,713 |
Less: accumulated depreciation |  |  | (271,639 | ) |  |  | (269,314 | )
Total property, plant and equipment, net |  | $ | 60,157 |  |  | $ | 62,399 |
Long-lived assets used in operations are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable and the undiscounted cash flows estimated to be generated by the asset are less than the asset’s carrying value. Due to the current economic environment, particularly related to COVID-19, the Company assessed impairment triggers related to long-lived assets during the first quarter of 2021. Based on this assessment, no triggers occurred to require the performance of an impairment test, and no impairment losses of long-lived assets were recorded. Depreciation expense was $3.1 million and $3.0 million for the three months ended March 31, 2021 and 2020, respectively, which is recorded in cost of revenue, selling, general and administrative expenses and research and development expenses in the Condensed Consolidated Statements of Income (Loss).

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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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