Employee Benefit Plan	12 Months Ended
Dec. 31, 2018
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plan	NOTE 12 – 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 2018 and 2017 and 6% in 2016, up to a limit of $4,000 in 2018 and 2017, and $3,000 in 2016. Matching funds are fully vested when contributed. Contributions to the Sangamo 401(k) Plan by the Company were $0.8 million, $0.5 million, and $0.3 million for the years ended December 31, 2018, 2017 and 2016, respectively.

Employee Benefit Plan

12 Months Ended

Dec. 31, 2018

Compensation And Retirement Disclosure [Abstract]

NOTE 12 – 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 2018 and 2017 and 6% in 2016, up to a limit of $4,000 in 2018 and 2017, and $3,000 in 2016. Matching funds are fully vested when contributed. Contributions to the Sangamo 401(k) Plan by the Company were $0.8 million, $0.5 million, and $0.3 million for the years ended December 31, 2018, 2017 and 2016, respectively.