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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 | 4. Property and Equipment Property and equipment consist of the following at December 31, 2020 and 2019 (in thousands):
|  | December 31, |
|  | 2020 |  |  | 2019 |
Property and equipment: |  |  |  |  |  |  |  |
Laboratory equipment |  | $ | 3,277 |  |  | $ | 1,715 |
Computer software and equipment |  |  | 650 |  |  |  | 595 |
Office furniture and fixtures |  |  | 301 |  |  |  | 301 |
Leasehold improvements |  |  | 317 |  |  |  | 317 |
Construction in progress |  |  | 498 |  |  |  | 138 |
|  | $ | 5,043 |  |  | $ | 3,066 |
Accumulated depreciation |  |  | (2,878 | ) |  |  | (2,829 | )
Property and equipment, net |  | $ | 2,165 |  |  | $ | 237 |
The Company recognized approximately $0.1 million and $27,000 of depreciation expense for the years ended December 31, 2020 and 2019, respectively. Property and Equipment Property and equipment are stated at cost, less accumulated depreciation. Depreciation expense is recognized using the straight-line method over the estimated useful life of each asset as follows:
|  | Estimated Useful Life
Laboratory equipment |  | 5 years
Computer software and equipment |  | 3 years
Office furniture and fixtures |  | 7 years
Leasehold improvements |  | Shorter of useful life or remaining term of related lease
Costs for capital assets not yet placed into service are capitalized as construction in progress and are depreciated in accordance with the above guidelines once placed into service. Upon retirement or sale, the cost of the assets disposed of and the related accumulated depreciation are eliminated from the balance sheet and related gains or losses are reflected in the consolidated statement of operations and comprehensive loss. Repairs and maintenance that do not improve or extend the lives of the respective assets are expensed as incurred, while costs of major additions and betterments are capitalized.

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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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