Trade Receivables - Summary of Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 3,017	$ 1,980
Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	2,774	310
Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	243	1,670
U.S. Department of Health and Human Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	536	1,675
U.S. Department of Health and Human Services | Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	293	5
U.S. Department of Health and Human Services | Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	243	1,670
Shionogi & Co. Ltd.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	1,893
Shionogi & Co. Ltd. | Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	1,893
Shionogi & Co. Ltd. | Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	0
Royalty receivables from partners
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	588	305
Royalty receivables from partners | Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	588	305
Royalty receivables from partners | Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 0	$ 0