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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2023
Grants, U.S. Government Contract and Joint Venture [Abstract] |
Schedule of Accounts Receivable, Unbilled Services, and Deferred Revenue | During the years ended December 31, 2023 and 2022, 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, 2023 | $ | 96,210 |  |  | $ | 1,472,768 |  |  | $ | (1,264,062) |  |  | $ | 304,916 |
Year ended December 31, 2022 | 454,993 |  |  | 1,768,457 |  |  | (2,127,240) |  |  | 96,210 |
Allowance for doubtful accounts(1): |  |  |  |  |  |  |
Year ended December 31, 2023 | (13,835) |  |  | — |  |  | 6,159 |  |  | (7,676) |
Year ended December 31, 2022 | — |  |  | (13,835) |  |  | — |  |  | (13,835) |
Deferred revenue(2): |  |  |  |  |  |  |
Year ended December 31, 2023 | 549,551 |  |  | 581,569 |  |  | (267,599)(3) |  | 863,521 |
Year ended December 31, 2022 | 1,595,472 |  |  | 46,908 |  |  | (1,092,829) |  |  | 549,551 |
(1) Bad debt expense was $13.8 million in the year ended 2022. There was no bad debt expense in the year ended December 31, 2023 or 2021. There was a $6.2 million reversal of a bad debt expense during the year ended December 31, 2023 due to the collection of a previously recognized allowance for doubtful accounts. To estimate the allowance for doubtful accounts, the Company evaluates the credit risk related to its customers based on historical loss experience, economic conditions, the aging of receivables, and customer-specific risks. (2) Deductions from Deferred revenue generally related to the recognition of revenue once performance obligations on a contract with a customer are met. Amount is comprised of $241.3 million, $0.4 billion, and $1.4 billion current Deferred revenue and $622.2 million, $179.4 million, and $172.5 million non-current Deferred revenue as of December 31, 2023, 2022, and 2021 respectively. (3) In 2023, deductions from Deferred revenue included $151.1 million that was realized in Revenue and $112.5 million related to the Amended and Restated UK Supply Agreement (as described below), that was reclassified to Other current liabilities, as described below. In 2022, deduction from Deferred revenue included $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) related to 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.
Schedule of Product Revenue | Product revenue by the Company’s customer’s geographic location was as follows (in thousands):
| December 31, 2023 |  | December 31, 2022
North America | $ | 29,959 |  |  | 194,480 |
Europe | 268,361 |  |  | 823,542 |
Rest of the world | 233,069 |  |  | 536,939 |
Total product revenue | $ | 531,389 |  |  | $ | 1,554,961 |
Schedule of Grant Revenue | The Company recognized grant revenue as follows (in thousands):
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
USG Agreement | $ | 427,323 |  |  | $ | 380,996 |  |  | $ | 788,953 |
U.S. DoD | — |  |  | 1,925 |  |  | 21,683 |
CEPI | — |  |  | — |  |  | 135,445 |
Other grant revenue | — |  |  | — |  |  | 2,628 |
Total grant revenue | $ | 427,323 |  |  | $ | 382,921 |  |  | $ | 948,709 |
Schedule of Revenue Gross to Net Deductions Balances | During the year ended December 31, 2023, changes in the Company’s gross-to-net deductions balances were as follows (in thousands):
| Wholesale Distributor Fees, Discounts, and Chargebacks |  | Product Returns |  | Total
Balance as of December 31, 2022 | $ | — |  |  | $ | — |  |  | $ | — |
Amounts charged against product sales | 47,028 |  |  | $ | 84,688 |  |  | $ | 131,716 |
Payments | $ | (25,956) |  |  | $ | (72) |  |  | $ | (26,028) |
Balance as of December 31, 2023 | $ | 21,072 |  |  | $ | 84,616 |  |  | $ | 105,688 |

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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph a -SubTopic 10 -Topic 280 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 + Details
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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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