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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
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,
| 2023 |  | 2022 |  | 2021 |  | 2023 |  | 2022
European Commission | 27 | % |  | 40% |  | * |  | 28 | % |  | 10%
Government of Australia | 18 | % |  | 21% |  | * |  | * |  | *
Government of Canada | * |  | 10% |  | * |  | 59% |  | *
Government of Israel | * |  | * |  | * |  | * |  | 21%
U.S. government(1) | 43 | % |  | 19 | % |  | 71 | % |  | * |  | 46%
CEPI | * |  | * |  | 12 | % |  | * |  | *
SK bioscience, Co., Ltd. | * |  | * |  | 14 | % |  | * |  | *
*Amounts represent less than 10% (1) Including the USG Agreement (as defined in Note 3) and the U.S. 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 as of (in thousands):
| December 31,
| 2023 |  | 2022
Land and buildings | $ | 102,916 |  |  | $ | 101,342 |
Machinery and equipment | 148,243 |  |  | 134,809 |
Leasehold improvements | 48,310 |  |  | 18,895 |
Computer hardware | 5,114 |  |  | 4,927 |
Construction in progress | 76,156 |  |  | 81,566 |
| 380,739 |  |  | 341,539 |
Less: accumulated depreciation | (74,968) |  |  | (47,292) |
Property and equipment, net | $ | 305,771 |  |  | $ | 294,247 |

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