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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 EQUITPMENT, NET Property and equipment consisted of the following (in thousands):
|  | As of December 31, |
|  | 2021 |  |  | 2020 |
Property and equipment: |  |  |  |  |  |
Lab equipment |  | $ | 1,776 |  |  | $ | 1,071 |
Leasehold improvements |  |  | 923 |  |  |  | 939 |
Electronic equipment and software |  |  | 430 |  |  |  | 71 |
Furniture and fixtures |  |  | 384 |  |  |  | — |
Total property and equipment |  |  | 3,513 |  |  |  | 2,081 |
Less: accumulated depreciation |  |  | (1,074 | ) |  |  | (688 | )
Property and equipment, net |  | $ | 2,439 |  |  | $ | 1,393 |
Depreciation expense for the years ended December 31, 2021 and 2020 was $0.5 million and $0.3 million, respectively. There were no impairments for the years ended December 31, 2021 and 2020.

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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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