The following table summarizes property and equipment as of December 31, 2021 and 2020: | | | | | | | | | | | | | December 31, | | | Estimated Useful | | | | | | | | | Lives | | 2021 | | 2020 | | | | (in years) | | (in thousands) | Leasehold improvements | | 2 to 5 | | $ | 463 | | $ | 463 | Computers and office equipment | | 3 | | | 83 | | | 60 | Furniture and fixtures | | 7 | | | 93 | | | 46 | Scientific equipment | | 7 | | | 460 | | | 460 | Total | | | | | 1,099 | | | 1,029 | Less: Accumulated depreciation | | | | | (874) | | | (798) | Net property and equipment | | | | $ | 225 | | $ | 231 |
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