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Acquisition of Acquisition of Sangamo France (Tables)
 12 Months Ended
Dec. 31, 2020
Business Combinations [Abstract]  
Summary of Non-controlling Interest
Non-controlling interest as of December 31, 2020 was as follows (in thousands):
Total
Balance at beginning of year$185 
Fair value of additional shares acquired(927)
Loss attributable to non-controlling interest(126)
Balance at end of year$(868)