Collaboration, License, and Other Agreements - BARDA Narrative (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2020	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Maximum agreement payments	$ 450.2
Other Transaction Agreement
Disaggregation of Revenue [Line Items]
Percentage of research and development costs to be paid by counterparty		80.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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