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PROPERTY AND EQUIPMENT | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
PROPERTY AND EQUIPMENT | NOTE 4 — PROPERTY AND EQUIPMENT
|  | December 31 |
|  | 2019 |  |  | 2020 |
Cost: |  |  |  |  |  |
Laboratory equipment |  | $ | 3,242 |  |  | $ | 3,644 |
Office equipment and furniture |  |  | 265 |  |  |  | 265 |
Computers and software |  |  | 490 |  |  |  | 530 |
Leasehold improvements |  |  | 1,946 |  |  |  | 1,953 |
|  |  | 5,943 |  |  |  | 6,392 |
Less: |  |  |  |  |  |  |  |
Accumulated depreciation and amortization |  |  | (3,629 | ) |  |  | (4,575 | )
Property and equipment, net |  | $ | 2,314 |  |  | $ | 1,817 |
Depreciation and amortization expense totaled $762, $887 and 946$ for the years ended December 31, 2018, 2019 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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