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Balance Sheet Components - Property and equipment, net (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Total property and equipment | $ 8,133 | $ 4,912 |
Accumulated depreciation and amortization | (2,841) | (1,264) |
Property and equipment, net | 5,292 | 3,648 |
Depreciation and amortization expense | 1,609 | 711 | $ 404
Capitalized internal-use software |  |  |
Total property and equipment | 6,167 | 3,554 |
Computer equipment and servers |  |  |
Total property and equipment | 631 | 458 |
Furniture and fixtures |  |  |
Total property and equipment | 184 | 238 |
Leasehold improvements |  |  |
Total property and equipment | 114 | 143 |
Construction in progress |  |  |
Total property and equipment | $ 1,037 | $ 519 |

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