Leases	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Leases	LeasesDuring the nine months ended September 30, 2022, the Company concluded that changes in facts and circumstances on its CMO and CDMO agreements that had previously been determined to represent embedded lease arrangements resulted in the modification of existing leases and, in accordance with its policy, the Company remeasured and reallocated the remaining consideration in the contracts and reassessed the lease classification as of the effective date of the modification. As a result, during the nine months ended September 30, 2022, the Company recognized a Right-Of-Use (“ROU”) asset and a corresponding long-term operating lease liability of $44.0 million on the remeasurement of its long-term supply agreements using an average incremental borrowing rate of 5%. The Company expensed the ROU asset since it relates to research and development activities for the development of NVX-CoV2373 for which the Company does not have an alternative future use.During the three and nine months ended September 30, 2022, the Company recognized a short-term lease benefit of $46.6 million and expense of $37.3 million, respectively, related to its embedded leases, net of a benefit of $98.3 million related to the Fujifilm Settlement Agreement (see Note 4). During the three and nine months ended September 30, 2022, the Company expensed $24.2 million and $44.0 million, respectively, of ROU assets that represented assets acquired for research and development activities that did not have an alternative future use at the commencement or modification of the lease. During the three and nine months ended September 30, 2021, the Company recognized a short-term lease expense of $111.3 million and $325.5 million, respectively, related to its embedded leases and expensed $4.4 million and $17.1 million, respectively, of ROU assets that represented assets acquired for research and development activities that did not have an alternative future use at the commencement or modification of the lease. During the three and nine months ended September 30, 2022, the Company recognized $0.9 million and $4.3 million of interest expense, respectively, on its finance lease liabilities. During the three and nine months ended September 30, 2021, the Company recognized $1.6 million and $5.6 million of interest expense, respectively, on its finance lease liabilities.During 2020, the Company entered into a lease agreement for the premises located at 700 Quince Orchard Road, Gaithersburg, Maryland. The lease is for approximately 170,000 square feet of space that the Company intends to use for manufacturing, research and development, and corporate offices. The term of the lease is 15 years with options to extend the lease. The lease provides for an annual base rent of $5.8 million that is subject to future rent increases and obligates the Company to pay building operating costs. During the nine months ended September 30, 2022, the Company obtained the right to direct the use of, and obtain substantially all of the benefit from, certain floors located at the premises and recognized an ROU asset and related lease obligation of $73.2 million as the lease commencement dates for accounting purposes had occurred
Leases	LeasesDuring the nine months ended September 30, 2022, the Company concluded that changes in facts and circumstances on its CMO and CDMO agreements that had previously been determined to represent embedded lease arrangements resulted in the modification of existing leases and, in accordance with its policy, the Company remeasured and reallocated the remaining consideration in the contracts and reassessed the lease classification as of the effective date of the modification. As a result, during the nine months ended September 30, 2022, the Company recognized a Right-Of-Use (“ROU”) asset and a corresponding long-term operating lease liability of $44.0 million on the remeasurement of its long-term supply agreements using an average incremental borrowing rate of 5%. The Company expensed the ROU asset since it relates to research and development activities for the development of NVX-CoV2373 for which the Company does not have an alternative future use.During the three and nine months ended September 30, 2022, the Company recognized a short-term lease benefit of $46.6 million and expense of $37.3 million, respectively, related to its embedded leases, net of a benefit of $98.3 million related to the Fujifilm Settlement Agreement (see Note 4). During the three and nine months ended September 30, 2022, the Company expensed $24.2 million and $44.0 million, respectively, of ROU assets that represented assets acquired for research and development activities that did not have an alternative future use at the commencement or modification of the lease. During the three and nine months ended September 30, 2021, the Company recognized a short-term lease expense of $111.3 million and $325.5 million, respectively, related to its embedded leases and expensed $4.4 million and $17.1 million, respectively, of ROU assets that represented assets acquired for research and development activities that did not have an alternative future use at the commencement or modification of the lease. During the three and nine months ended September 30, 2022, the Company recognized $0.9 million and $4.3 million of interest expense, respectively, on its finance lease liabilities. During the three and nine months ended September 30, 2021, the Company recognized $1.6 million and $5.6 million of interest expense, respectively, on its finance lease liabilities.During 2020, the Company entered into a lease agreement for the premises located at 700 Quince Orchard Road, Gaithersburg, Maryland. The lease is for approximately 170,000 square feet of space that the Company intends to use for manufacturing, research and development, and corporate offices. The term of the lease is 15 years with options to extend the lease. The lease provides for an annual base rent of $5.8 million that is subject to future rent increases and obligates the Company to pay building operating costs. During the nine months ended September 30, 2022, the Company obtained the right to direct the use of, and obtain substantially all of the benefit from, certain floors located at the premises and recognized an ROU asset and related lease obligation of $73.2 million as the lease commencement dates for accounting purposes had occurred