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Sale of Business to Veracyte (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Feb. 27, 2020
Dec. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]          
Gain on sale of business, net     $ 0 $ 0 $ 48,871
Veracyte          
Business Acquisition [Line Items]          
Gain on sale of business, net       48,900  
Veracyte          
Business Acquisition [Line Items]          
Consideration transferred   $ 50,000      
Cash paid   $ 40,000      
Shares transferred   376,732      
Value of shares transferred   10.0 million      
Milestone payments $ 10,000        
Transaction costs       $ 1,100