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Balance Sheet Details - Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Property and equipment, net |  |  |
Property and equipment, gross | $ 89,621 | $ 39,929 |
Less accumulated depreciation and amortization | (20,652) | (15,921) |
Property and equipment, net | 68,969 | 24,008 | $ 22,056
Depreciation and amortization | 29,661 | 29,381 | 6,306
Facilities at 6797 Winchester Circle, Boulder, Colorado |  |  |
Property and equipment, net |  |  |
Property and equipment, gross | 874 | 874 |
Equipment leases with General Electric Capital Corporation |  |  |
Property and equipment, net |  |  |
Property and equipment, gross | 19,280 | 15,737 |
Furniture and fixtures |  |  |
Property and equipment, net |  |  |
Property and equipment, gross | 1,706 | 1,820 |
Leasehold improvements |  |  |
Property and equipment, net |  |  |
Property and equipment, gross | 6,152 | 5,851 |
Computer equipment and software |  |  |
Property and equipment, net |  |  |
Property and equipment, gross | 3,333 | 2,754 |
Land |  |  |
Property and equipment, net |  |  |
Property and equipment, gross | 7,068 | 7,068 |
Construction in progress |  |  |
Property and equipment, net |  |  |
Property and equipment, gross | 51,208 | 5,825 |
Property, Plant and Equipment |  |  |
Property and equipment, net |  |  |
Depreciation and amortization | $ 4,800 | $ 6,100 | $ 3,700

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