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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2022
Grants, U.S. Government Contract and Joint Venture [Abstract] |
Schedule of Accounts Receivable, Unbilled Services, and Deferred Revenue | During the years ended December 31, 2022 and 2021, changes in the Company's accounts receivables, deferred revenue, and allowance for doubtful accounts balances were as follows (in thousands):
| Balance, Beginning of Period |  | Additions |  | Deductions |  | Balance, End of Period
Accounts receivable: |  |  |  |  |  |  |
Year ended December 31, 2022 | $ | 454,993 |  |  | $ | 1,768,457 |  |  | $ | (2,127,240) |  |  | $ | 96,210 |
Year ended December 31, 2021 | 262,012 |  |  | 2,432,268 |  |  | (2,239,287) |  |  | 454,993 |
Allowance for doubtful accounts: |  |  |  |  |  |  |
Year ended December 31, 2022 | — |  |  | (13,835)(1) |  | — |  |  | (13,835) |
Year ended December 31, 2021 | — |  |  | — |  |  | — |  |  | — |
Deferred revenue(2): |  |  |  |  |  |  |
Year ended December 31, 2022 | 1,595,472 |  |  | 46,908 |  |  | (1,092,829)(3) |  | 549,551 |
Year ended December 31, 2021 | 273,228 |  |  | 1,598,152 |  |  | (275,908) |  |  | 1,595,472 |
(1) Bad debt expense was $13.8 million in the year ended December 31, 2022 and there was no bad debt expense in the years ended December 31, 2021 and 2020. (2) Amount is comprised of $0.4 billion, $1.4 billion, and $0.3 billion current Deferred revenue and $179.4 million, $172.5 million, and no non-current Deferred revenue as of December 31, 2022, 2021, and 2020 respectively. (3) Deductions from Deferred revenue include the following: $273.8 million that was realized in Revenue and $819.0 million, including $697.4 million related to the Advance Payment Amount (as described below) at issue in the Gavi arbitration and $112.5 million related to the Amended and Restated UK Supply Agreement, that was reclassified to Other current liabilities, as described below. In the fourth quarter of 2022, the Company recognized revenue of $41.9 million related to a change in estimate attributed to changes in constraint of variable consideration.
Schedule of Product Revenue | Product revenue by the Company’s customer’s geographic location was as follows (in thousands):
| Year Ended December 31, 2022
North America | $ | 194,480 |
Europe | 823,542 |
Rest of the world | 536,939 |
Total product revenue | $ | 1,554,961 |
Schedule of Grant Revenue | The Company recognized grant revenue as follows (in thousands):
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
USG Agreement | $ | 380,996 |  |  | $ | 788,953 |  |  | $ | 204,727 |
U.S. DoD | 1,925 |  |  | 21,683 |  |  | 12,519 |
CEPI | — |  |  | 135,445 |  |  | 223,158 |
Other grant revenue | — |  |  | 2,628 |  |  | 12,806 |
Total grant revenue | $ | 382,921 |  |  | $ | 948,709 |  |  | $ | 453,210 |

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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