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ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Narrative (Detail) - Sangamo France - USD ($)
$ / shares in Units, shares in Thousands
1 Months Ended 9 Months Ended
Oct. 31, 2018
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2018
Oct. 01, 2018
Jul. 20, 2018
Business Acquisition [Line Items]            
Consideration transferred $ 45,900,000          
Goodwill impairments   $ 0 $ 0      
Business acquisition, share price (in dollars per share)         $ 2.99  
Share purchase agreement and tender offer agreement            
Business Acquisition [Line Items]            
Percentage of equity interests agreed to acquire   100.00%   100.00%    
Number of free shares held by the holders (in shares)       477   477
Number of ordinary shares acquired (in shares)   477