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Employee Benefit Plan
 12 Months Ended
Dec. 31, 2020
Retirement Benefits [Abstract]  
Employee Benefit Plan EMPLOYEE BENEFIT PLAN
The Company sponsors a defined-contribution savings plan under Section 401(k) of the Internal Revenue Code covering all full-time employees (“Sangamo 401(k) Plan”). The Sangamo 401(k) Plan is intended to qualify under Section 401 of the Internal Revenue Code.
The Company matched employee contributions equal to 50% for the first 8% in 2020, 2019 and 2018, up to a limit of $4,000 in 2020, 2019 and 2018. Matching funds are fully vested when contributed. Contributions to the Sangamo 401(k) Plan by the Company were $1.2 million, $0.9 million, and $0.8 million for the years ended December 31, 2020, 2019 and 2018, respectively.