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Property, Equipment and Software | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property, Equipment and Software | Property, Equipment and Software Property, equipment and software consists of the following (in thousands):
| December 31,
| 2021 |  | 2020
Computer equipment | $ | 2,890 |  |  | $ | 2,663 |
Software | 9,453 |  |  | 8,242 |
Furniture and office equipment | 713 |  |  | 713 |
Motor vehicles | 50 |  |  | 50 |
Lab equipment | 45,693 |  |  | 41,202 |
Leasehold improvements | 51,056 |  |  | 48,884 |
Construction in progress | 630 |  |  | 2,022 |
Property, equipment and software | 110,485 |  |  | 103,776 |
Less accumulated depreciation and amortization | (72,809) |  |  | (61,551) |
Property, equipment and software, net | $ | 37,676 |  |  | $ | 42,225 |
Depreciation and amortization expense related to property, equipment and software for the years ended December 31, 2021, 2020 and 2019 was $11.3 million, $12.0 million and $12.3 million, respectively.

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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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