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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 | 5. Property and equipment, net Property and equipment, net consisted of the following:
|  | As of December 31, |
|  | 2021 |  |  | 2020 |
Laboratory equipment |  | $ | 4,670 |  |  | $ | 3,936 |
Furniture and fixtures |  |  | 153 |  |  |  | 108 |
Leasehold improvements |  |  | 263 |  |  |  | 210 |
Office equipment |  |  | 108 |  |  |  | 108 |
Construction in progress |  |  | 1,606 |  |  |  | 5 |
|  |  | 6,800 |  |  |  | 4,367 |
Less accumulated depreciation |  |  | (2,661 | ) |  |  | (1,692 | )
|  | $ | 4,139 |  |  | $ | 2,675 |
Depreciation expense was $1.0 million and $0.9 million for the years ended December 31, 2021 and 2020, 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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