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Revenue Recognition - Summary of Balances and Activities Deferred Revenue Accounts (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
USD ($)
Deferred Revenue Arrangement [Line Items]  
Balance at Beginning of Period $ 349,864
Balance at End of Period 313,203
CpG 1018  
Deferred Revenue Arrangement [Line Items]  
Balance at Beginning of Period 349,864
Additions 368 [1]
Revenue recognized in the current period included in deferred revenue balance at the beginning of the period (37,029)
Balance at End of Period 313,203
Long-term Deferred Revenue | CpG 1018  
Deferred Revenue Arrangement [Line Items]  
Balance at Beginning of Period 5,385
Additions 6,582 [1]
Subtractions $ (11,967) [2]
[1] Additions are primarily payments received or invoices issued before we satisfy our performance obligations.
[2] Subtractions are primarily revenues recognized in the period included in deferred revenue during the period and reclassification from long-term deferred revenue to accrued liabilities.