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ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Summary of Estimated Fair Value of Net Assets Acquired (Detail) - USD ($)
$ in Thousands
Oct. 01, 2018
Mar. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]      
Goodwill   $ 38,550 $ 39,273
Sangamo France      
Business Acquisition [Line Items]      
Consideration transferred $ 45,911    
Fair value of non-controlling interest 35,829    
Fair value of Sangamo France 81,740    
Cash 4,779    
Current assets 2,427    
Property and equipment 1,857    
IPR&D 55,019    
Other assets 155    
Current liabilities (9,761)    
Assumed debt liabilities (4,933)    
Deferred tax liability, net (6,798)    
Fair value of net identifiable assets acquired 42,745    
Goodwill 38,995    
Total fair value of net assets acquired $ 81,740