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Fair Value Measurements - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Select operating assets and intellectual property of Myriad Autoimmune business unit and Myriad RBM, Inc    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Impairment on asset group held for sale $ 0  
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated fair value of long-term debt $ 106,000,000.0 $ 106,000,000.0
Level 3 | Measurement input, expected term    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Measurement period for earn out liability   14 years