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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounting Policies [Abstract] |
Schedules of Concentration of Risk | The Company's accounts receivable arise from revenue arrangements with customers in different countries. The Company's revenue is primarily due to product sales, grants made by government-sponsored and private organizations, and royalties from its collaboration and license partners. The following customers accounted for more than 10% of total revenue or accounts receivable for the periods presented:
| Percentage of Revenue for Year Ended December 31, |  | Percentage of Accounts Receivable as of December 31,
| 2022 |  | 2021 |  | 2020 |  | 2022 |  | 2021
European Commission | 40 | % |  | * |  | * |  | 10 | % |  | *
Government of Australia | 21 | % |  | * |  | * |  | * |  | *
Government of Canada | 10 | % |  | * |  | * |  | * |  | *
Government of Israel | * |  | * |  | * |  | 21 | % |  | *
Gavi, the Vaccine Alliance | * |  | * |  | * |  | * |  | 77 | %
U.S. government(1) | 19 | % |  | 71 | % |  | 46 | % |  | 46 | % |  | *
CEPI | * |  | 12 | % |  | 47 | % |  | * |  | *
SK bioscience, Co., Ltd. | * |  | 14 | % |  | * |  | * |  | *
*Amounts represent less than 10% (1) Including the USG Agreement (as defined in Note 3) and Department of Defense.
Schedule of Property and Equipment, Net | The estimated useful lives of property and equipment are described below:
| Useful Life
Buildings | 25 years
Machinery and equipment | 5 - 7 years
Computer hardware | 3 years
Leasehold improvements | Shorter of useful life or remaining term of the lease
Property and equipment is comprised of the following at December 31 (in thousands):
| December 31,
| 2022 |  | 2021
Land and buildings | $ | 101,342 |  |  | $ | 83,534 |
Machinery and equipment | 134,809 |  |  | 119,998 |
Leasehold improvements | 18,895 |  |  | 10,282 |
Computer hardware | 4,927 |  |  | 2,612 |
Construction in progress | 81,566 |  |  | 35,114 |
| 341,539 |  |  | 251,540 |
Less: accumulated depreciation | (47,292) |  |  | (25,799) |
Property and equipment, net | $ | 294,247 |  |  | $ | 225,741 |

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