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Invitae Collaboration (Narrative) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Development and Commercialization of Significant Agreements Transactions [Line Items]    
Deferred revenue, non-current $ 25,246 $ 25,049
Invitae Corporation [Member]    
Development and Commercialization of Significant Agreements Transactions [Line Items]    
Deferred revenue, non-current $ 23,500