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Collaborative Arrangements - Roche (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]      
Contract liabilities, deferred revenue   $ 6,335 $ 4,791
Roche      
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]      
Liability, revenue recognized   $ 900 $ 900
Roche | Milestone One      
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]      
Contract liabilities, deferred revenue $ 800    
Number of days for payment 45 days    
Roche | Milestone Two      
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]      
Contingent receivable $ 900