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Property, Equipment and Leasehold Improvements | 3 Months Ended
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Mar. 31, 2023
Property, Plant and Equipment [Abstract] |
Property, Equipment and Leasehold Improvements | Property, Equipment and Leasehold Improvements Property, equipment and leasehold improvements consist of the following:
(dollars in millions) | March 31, 2023 |  | December 31, 2022
Laboratory equipment | $ | 17.4 |  |  | $ | 17.1 |
Leasehold improvements | 11.4 |  |  | 10.9 |
Office equipment | 2.2 |  |  | 2.0 |
Total property, equipment and leasehold improvements | 31.0 |  |  | 30.0 |
Less: accumulated depreciation and amortization | (17.6) |  |  | (16.6) |
Property, equipment and leasehold improvements, net | $ | 13.4 |  |  | $ | 13.4 |
Depreciation and amortization expense totaled $1.2 million and $1.5 million for the three months ended March 31, 2023 and 2022, 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 https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://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 https://asc.fasb.org/extlink&oid=126982197&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 https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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