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Trade Receivables - Summary of Receivables (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total receivables $ 1,843 $ 1,980
Billed    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total receivables 540 310
Unbilled    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total receivables 1,303 1,670
U.S. Department of Health and Human Services    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total receivables 1,303 1,675
U.S. Department of Health and Human Services | Billed    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total receivables 0 5
U.S. Department of Health and Human Services | Unbilled    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total receivables 1,303 1,670
Royalty receivables from partners    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables 540 305
Royalty receivables from partners | Billed    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables 540 305
Royalty receivables from partners | Unbilled    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables $ 0 $ 0