Basic and Diluted Net Loss Per Share	3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]
Basic and Diluted Net Loss Per Share	NOTE 4—BASIC AND DILUTED NET LOSS PER SHARE Basic net loss per share attributable to Sangamo Therapeutics, Inc. stockholders has been computed by dividing net loss attributable to Sangamo Therapeutics, Inc. stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share attributable to Sangamo Therapeutics, Inc. stockholders is calculated by dividing net loss attributable to Sangamo Therapeutics, Inc. stockholders by the weighted-average number of shares of common stock and potential dilutive securities outstanding during the period. The total number of shares subject to stock options and restricted stock units (“RSUs”) outstanding, which are all anti-dilutive, were excluded from consideration in the calculation of diluted net loss per share attributable to Sangamo Therapeutics, Inc. stockholders. Stock options and RSUs outstanding as of March 31, 2019 and 2018 were 11,604,633 and 8,858,623, respectively.

Basic and Diluted Net Loss Per Share

3 Months Ended

Mar. 31, 2019

NOTE 4—BASIC AND DILUTED NET LOSS PER SHARE

Basic net loss per share attributable to Sangamo Therapeutics, Inc. stockholders has been computed by dividing net loss attributable to Sangamo Therapeutics, Inc. stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share attributable to Sangamo Therapeutics, Inc. stockholders is calculated by dividing net loss attributable to Sangamo Therapeutics, Inc. stockholders by the weighted-average number of shares of common stock and potential dilutive securities outstanding during the period.

The total number of shares subject to stock options and restricted stock units (“RSUs”) outstanding, which are all anti-dilutive, were excluded from consideration in the calculation of diluted net loss per share attributable to Sangamo Therapeutics, Inc. stockholders. Stock options and RSUs outstanding as of March 31, 2019 and 2018 were 11,604,633 and 8,858,623, respectively.