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Property and Equipment, Net | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property and Equipment, Net | PROPERTY AND EQUIPMENT, NET Property and equipment consist of the following (in thousands):
| December 31,
| 2021 |  | 2020
Laboratory equipment | $ | 7,474 |  |  | $ | 7,268 |
Office equipment and furniture | 2,034 |  |  | 1,133 |
Leasehold improvements | 8,745 |  |  | 7,985 |
Property and equipment, gross | 18,253 |  |  | 16,386 |
Less: accumulated depreciation | (15,891) |  |  | (14,450) |
Total property and equipment, net | $ | 2,362 |  |  | $ | 1,936 |
We recognized depreciation expense in the amount of $1.4 million, $1.8 million, and $2.5 million for the years ended December 31, 2021, 2020 and 2019, 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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