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Revenue
 3 Months Ended
Mar. 31, 2023
Grants, U.S. Government Contract and Joint Venture [Abstract]  
Revenue Revenue
The Company's accounts receivable included $70.2 million, $53.8 million, $425.9 million, and $419.7 million related to amounts that were billed to customers and $42.7 million, $28.6 million, $52.3 million, and $35.3 million related to amounts which had not yet been billed to customers as of March 31, 2023, December 31, 2022, March 31, 2022, and December 31, 2021, respectively. During the three months ended March 31, 2023 and 2022, changes in the Company's accounts receivables, allowance for doubtful accounts, and deferred revenue balances were as follows (in thousands):
Balance, Beginning of PeriodAdditionsDeductions Balance, End of Period
Accounts receivable:
Three months ended March 31, 2023$96,210 $146,424 $(115,950)$126,684 
Three months ended March 31, 2022454,993 625,124 (601,961)478,156 
Allowance for doubtful accounts(1):
Three months ended March 31, 2023$(13,835)$— $— $(13,835)
Three months ended March 31, 2022— — — — 
Deferred revenue:
Three months ended March 31, 2023$549,551 $140,324 $(49)$689,826 
Three months ended March 31, 20221,595,472 49,094 (108,586)1,535,980 
(1)    There was no bad debt expense recorded during the three months ended March 31, 2023 or 2022. 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.
As of March 31, 2023, the aggregate amount of the transaction price allocated to performance obligations that were unsatisfied (or partially unsatisfied), excluding amounts related to sales-based royalties, the Gavi APA, and the reduction in doses related to the Amended and Restated UK Supply Agreement, was approximately $3 billion of which $689.8 million was included in Deferred revenue. Failure to meet regulatory milestones, timely obtain supportive recommendations from governmental advisory committees, or achieve product volume or delivery timing obligations under the Company’s advance purchase agreements (“APAs”) may require the Company to refund portions of upfront payments or result in reduced future payments, which could adversely impact the Company’s ability to realize revenue from its unsatisfied performance obligations. The timing to fulfill performance obligations related to grant agreements will depend on the results of the Company's research and development activities, including clinical trials, and delivery of doses. The timing to fulfill performance obligations related to APAs will depend on timing of product manufacturing, receipt of marketing authorizations for additional indications, delivery of doses based on customer demand, and the ability of the customer to request variant vaccine in place of the prototype
NVX-CoV2373 vaccine under certain of our APAs. The remaining unfilled performance obligations not related to grant agreements or APAs are expected to be fulfilled in less than 12 months.
Under the terms of the Gavi APA and a separate purchase agreement between Gavi and Serum Institute of India Pvt. Ltd. (“SIIPL”), 1.1 billion doses of NVX-CoV2373 were to be made available to countries participating in the COVAX Facility. The Company expected to manufacture and distribute 350 million doses of NVX-CoV2373 to countries participating under the COVAX Facility. Under a separate purchase agreement with Gavi, SIIPL was expected to manufacture and deliver the balance of the 1.1 billion doses of NVX-CoV2373 for low- and middle-income countries participating in the COVAX Facility. The Company expected to deliver doses with antigen and adjuvant manufactured at facilities directly funded under the Company's funding agreement with Coalition for Epidemic Preparedness Innovations (“CEPI”), with initial doses supplied by SIIPL and Serum Life Sciences Limited (“SLS”) under a supply agreement. The Company expected to supply significant doses that Gavi would allocate to low-, middle- and high-income countries, subject to certain limitations, utilizing a tiered pricing schedule and Gavi could prioritize such doses to low- and middle- income countries, at lower prices. Additionally, the Company could provide additional doses of NVX-CoV2373, to the extent available from CEPI-funded manufacturing facilities, in the event that SIIPL could not materially deliver expected vaccine doses to the COVAX Facility. Under the agreement, the Company received an upfront payment of $350.0 million from Gavi in 2021 and an additional payment of $350 million in 2022 related to the Company’s achieving an emergency use license for NVX-CoV2373 by the WHO (the “Advance Payment Amount”).

On November 18, 2022, the Company delivered written notice to Gavi to terminate the Gavi APA on the basis of Gavi’s failure to procure the purchase of 350 million doses of NVX-CoV2373 from the Company as required by the Gavi APA. As of November 18, 2022, the Company had only received orders under the Gavi APA for approximately 2 million doses. On December 2, 2022, Gavi issued a written notice purporting to terminate the Gavi APA based on Gavi’s contention that the Company repudiated the agreement and, therefore, materially breached the Gavi APA. Gavi also contends that, based on its purported termination of the Gavi APA, it is entitled to a refund of the Advance Payment Amount less any amounts that have been credited against the purchase price for binding orders placed by a buyer participating in the COVAX Facility. As of March 31, 2023, the remaining Gavi Advance Payment Amount of $697.4 million, pending resolution of the dispute with Gavi related to a return of the remaining Advance Payment Amount, was reclassified from Deferred revenue to Other current liabilities in the Company’s consolidated balance sheets. On January 24, 2023, Gavi filed a demand for arbitration with the International Court of Arbitration based on the claims described above. The Company filed its Answer and Counterclaims on March 2, 2023. On April 5, 2023, Gavi filed its Reply to the Company’s Counterclaims. Arbitration is inherently uncertain, and while the Company believes that it is entitled to retain the remaining Advance Payment Amount received from Gavi, it is possible that it could be required to refund all or a portion of the remaining Advance Payment Amount from Gavi.
Product Sales
Product sales by the Company’s customer’s geographic location was as follows (in thousands):
Three Months Ended
March 31,
20232022
North America
$— $64,762 
Europe57,267 413,745 
Rest of the world
(64,724)107,121 
Total product revenue$(7,457)$585,628 
In May 2023, the Company extended a credit for certain doses delivered in 2022 that qualified for replacement under the contract with the customer. This credit is the result of a single lot sold to the Australian government that upon pre-planned 6-month stability testing was found to have fallen below the defined specifications and the lot was therefore removed from the market. The credit will be applied against the future sale of doses to the customer and, during the three months ended March 31, 2023, the Company recorded a reduction of $64.7 million in product sales, with a corresponding increase to Deferred revenue, non-current.
Grants
The Company’s U.S. government agreement consists of a Project Agreement (the “Project Agreement”) and a Base Agreement with Advanced Technology International, the Consortium Management Firm acting on behalf of the Medical CBRN Defense Consortium in connection with the partnership formerly known as Operation Warp Speed (the Base Agreement
together with the Project Agreement are referred to as the “USG Agreement”). In February 2023, in connection with the execution of Modification 17 to the Project Agreement, the U.S. government indicated to the Company that the award may not be extended past its current period of performance, December 31, 2023. Also, Modification 17 included provisions requiring that the payment of $60.0 million of consideration associated with manufacturing work now be contingent upon meeting certain milestones, including the delivery of up to 1.5 million doses of NVX-CoV2373 and development and regulatory milestones related to commercial readiness, expansion of the EUA and development of multiple vial presentations. As of March 31, 2023, the Company constrained the total transaction price by $48.0 million for consideration associated with milestones that are not fully within the Company’s control. This constraint, in addition to other contract changes included within Modification 17, resulted in an approximately $29 million cumulative reduction to revenue previously recognized under the contract for the three months ended March 31, 2023.
Royalties and Other
During the three months ended March 31, 2023, the Company did not recognize revenue related to sales-based royalties. The Company recognized $7.4 million in revenue related to sales-based royalties during the three months ended March 31, 2022Collaboration, License, and Supply Agreements
Serum Institute
The Company previously granted SIIPL exclusive and non-exclusive licenses for the development, co-formulation, filling and finishing, registration, and commercialization of NVX-CoV2373, its proprietary COVID-19 variant antigen candidate(s), its quadrivalent influenza vaccine candidate, and its CIC vaccine candidate. SIIPL agreed to purchase the Company's Matrix-M™ adjuvant and the Company granted SIIPL a non-exclusive license to manufacture the antigen drug substance component of NVX-CoV2373 in SIIPL’s licensed territory solely for use in the manufacture of NVX-CoV2373. The Company and SIIPL equally split the revenue from SIIPL’s sale of NVX-CoV2373 in its licensed territory, net of agreed costs. The Company also has a supply agreement with SIIPL and SLS under which SIIPL and SLS supply the Company with NVX-CoV2373, its proprietary COVID-19 variant antigen candidate(s), its quadrivalent influenza vaccine candidate, and its CIC vaccine candidate for commercialization and sale in certain territories, as well as a contract development manufacture agreement with SLS, under which SLS manufactures and supplies finished vaccine product to the Company using antigen drug substance and Matrix-M™ adjuvant supplied by the Company. In March 2020, the Company granted SIIPL a non-exclusive license for the use of Matrix-M™ adjuvant supplied by the Company to develop, manufacture, and commercialize R21, a malaria candidate developed by the Jenner Institute, University of Oxford (“R21/Malaria”). Under the agreement, SIIPL purchases the Company's Matrix-M™ adjuvant to manufacture R21/Malaria and SIIPL pays a royalty in the single to low double-digit range for a period of 15 years after the first commercial sale of product in each country.
Takeda Pharmaceutical Company Limited
The Company has a collaboration and license agreement with Takeda Pharmaceutical Company Limited (“Takeda”) under which the Company granted Takeda an exclusive license to develop, manufacture, and commercialize NVX-CoV2373 in Japan. Under the agreement, Takeda purchases Matrix-M™ adjuvant from the Company to manufacture doses of NVX-CoV2373 and the Company is entitled to receive payments from Takeda based on the achievement of certain development and commercial milestones, as well as a portion of net profits from the sale of NVX-CoV2373. In September 2021, Takeda finalized an agreement with the Government of Japan’s Ministry of Health, Labour and Welfare ("MHLW") for the purchase of 150 million doses of NVX-CoV2373. In February 2023, MHLW cancelled the remainder of doses under its agreement with Takeda. As a result, it is uncertain whether the Company will receive future payments from Takeda under the terms and conditions of their current collaboration and licensing agreement.
Other Supply Agreements
On September 30, 2022, the Company, FUJIFILM Diosynth Biotechnologies UK Limited (“FDBK”), FUJIFILM Diosynth Biotechnologies Texas, LLC (“FDBT”), and FUJIFILM Diosynth Biotechnologies USA, Inc. (“FDBU” and together with FDBK and FDBT, “Fujifilm”) entered into a Confidential Settlement Agreement and Release (the “Fujifilm Settlement Agreement”) regarding amounts due to Fujifilm in connection with the termination of manufacturing activity at FDBT under the Commercial Supply Agreement (the “CSA”) dated August 20, 2021 and Master Services Agreement dated June 30, 2020 and associated statements of work (the “MSA”) by and between the Company and Fujifilm. The MSA and CSA established the general terms and conditions applicable to Fujifilm’s manufacturing and supply activities related to NVX-CoV2373 under the associated statements of work.
Pursuant to the Fujifilm Settlement Agreement, the Company is responsible for payment of up to $185.0 million (the “Settlement Payment”) to Fujifilm in connection with cancellation of manufacturing activity at FDBT under the CSA, of which (i) $47.8 million, constituting the initial reservation fee under the CSA, was credited against the Settlement Payment on September 30, 2022 and (ii) the remaining balance is to be paid in four equal quarterly installments of $34.3 million each, which began on March 31, 2023. As of March 31, 2023, the remaining payment of $102.9 million was reflected in Accrued expenses. Under the Fujifilm Settlement Agreement, Fujifilm is required to use commercially reasonable efforts to mitigate the losses associated with the vacant manufacturing capacity caused by the termination of manufacturing activities at FDBT under the Fujifilm CSA, and the final two quarterly installments will be mitigated by any replacement revenue achieved by Fujifilm between July 1, 2023 and December 31, 2023.
The Company continues to assess its manufacturing needs and intends to modify its global manufacturing footprint consistent with its contractual obligations to supply, and anticipated demand for, NVX-CoV2373, and in doing so, recognizes that significant costs may be incurred.