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Equity Method Investments - Schedule of Equity Method Investments (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Apr. 30, 2017
Schedule Of Equity Method Investments [Line Items]      
Carrying Value $ 872 $ 1,512  
Ownership percentage 30.00% 30.00%  
FF Gene Biotech      
Schedule Of Equity Method Investments [Line Items]      
Carrying Value $ 872 $ 1,512  
Ownership percentage 30.00% 30.00% 30.00%