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Property and Equipment, Net | 12 Months Ended
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Dec. 31, 2021
Property and Equipment, Net |
Property and Equipment, Net | 4. Property and Equipment, Net ​ Property and equipment, net consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2021 |  | 2020
Computer office equipment | ​ | $ | 51 | ​ | $ | 51
Leasehold improvements | ​ | ​ | 69 | ​ | ​ | 69
Lab equipment | ​ |  | 76 | ​ |  | 76
Furnitures and fixtures | ​ |  | 30 | ​ |  | 30
​ | ​ |  | 226 | ​ |  | 226
Less: accumulated depreciation | ​ |  | (190) | ​ |  | (161)
Property and equipment, net | ​ | $ | 36 | ​ | $ | 65
​ Depreciation expense was $29 and $34 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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