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PROPERTY AND EQUIPMENT, NET | 12 Months Ended
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Dec. 31, 2022
PROPERTY AND EQUIPMENT, NET [Abstract] |
PROPERTY AND EQUIPMENT, NET | 3. PROPERTY AND EQUIPMENT, NET A summary of property and equipment at December 31, 2022 and 2021 is as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
Furniture and fixtures and leasehold improvements | ​ | $ | 24 | ​ | $ | 12
Laboratory equipment | ​ |  | 931 | ​ |  | 794
Computer equipment and laboratory software | ​ |  | 990 | ​ |  | 725
Construction in process | ​ |  | 34 | ​ |  | 138
​ | ​ |  | 1,979 | ​ |  | 1,669
Less—accumulated depreciation and amortization | ​ |  | (1,102) | ​ |  | (833)
Total | ​ | $ | 877 | ​ | $ | 836
​ Depreciation expense was approximately $0.3 million and $0.2 million for the years ended December 31, 2022 and 2021, 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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