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ACQUISITION OF SANGAMO THERAPEUTICS FRANCE S.A.S. - Summary of Non-controlling Interest (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Noncontrolling Interest [Roll Forward]        
Balance at December 31, 2019     $ 185  
Fair value of additional shares acquired     (660)  
Loss attributable to non-controlling interest $ 42 $ (54) (55) $ (179)
Balance at September 30, 2020 $ (530)   $ (530)