XML 23 R50.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Acquisition of Sangamo France - Summary of Non-controlling Interest (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Stockholders' Equity Attributable to Noncontrolling Interest                      
Stockholders' equity attributable to noncontrolling interest, beginning balance       $ 739         $ 739    
Fair value of additional shares acquired                 (321)    
Net loss attributable to non-controlling interest $ (54) $ (54) $ (72) (53) $ (555) $ 0 $ 0 $ 0 (233) $ (555) $ 0
Stockholders' equity attributable to noncontrolling interest, ending balance 185       739       185 739  
Non- Controlling Interest                      
Stockholders' Equity Attributable to Noncontrolling Interest                      
Stockholders' equity attributable to noncontrolling interest, beginning balance       $ 739         739    
Stockholders' equity attributable to noncontrolling interest, ending balance $ 185       $ 739       $ 185 $ 739