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PROPERTY AND EQUIPMENT | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
PROPERTY AND EQUIPMENT | PROPERTY AND EQUIPMENT The following table sets forth the composition of property and equipment, net as of December 31, 2021 and 2020 (in thousands):
| December 31,
| 2021 |  | 2020
Lab equipment | $ | 569 |  |  | $ | 570 |
Furniture and fixtures | 16 |  |  | 16 |
Computer equipment | 99 |  |  | 97 |
Software | 32 |  |  | 28 |
Leasehold improvements | 293 |  |  | 293 |
Property and equipment, gross | 1,009 |  |  | 1,004 |
Less: accumulated depreciation | (966) |  |  | (881) |
Total Property and Equipment, Net | $ | 43 |  |  | $ | 123 |
Depreciation expense was $0.1 million, $0.1 million and $0.2 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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