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Property and Equipment | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment Property and equipment consist of the following:
|  | December 31,
(in thousands) |  | 2023 |  | 2022
Leasehold improvements |  | $ | 28,032 |  |  | $ | 24,162 |
Research equipment |  | 16,220 |  |  | 16,345 |
Computer equipment |  | 4,934 |  |  | 4,486 |
Construction in progress |  | 3,810 |  |  | 4,160 |
Furniture and fixtures |  | 2,928 |  |  | 2,734 |
Computer software |  | 1,106 |  |  | 1,106 |
Vehicles |  | 66 |  |  | 66 |
Gross property and equipment |  | 57,096 |  |  | 53,059 |
Less accumulated depreciation |  | (25,429) |  |  | (22,281) |
Net property and equipment |  | $ | 31,667 |  |  | $ | 30,778 |
For both the years ended December 31, 2023 and 2022, depreciation expense was $4.8 million. Additionally, during the year ended December 31, 2022, in connection with the strategic deprioritization of its gene therapy portfolio, the Company performed an assessment of its fixed assets. As a result, the Company recognized an impairment charge of $6.6 million.

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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://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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