INCOME TAXES	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXESThe Company’s provision for income taxes for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any, that arise during the period. Each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual effective tax rate changes, the Company makes a cumulative adjustment in such period. In the three and nine months ended September 30, 2021, the Company recorded income tax expense of $0.1 million and $0.4 million, respectively. In the three and nine months ended September 30, 2020, the Company recorded income tax expense of $0.2 million and $0.2 million, respectively. The Company continues to maintain a full valuation allowance on its U.S. federal and state net deferred tax assets and on the Sangamo France net deferred tax assets, as the Company believes it is not more likely than not that these benefits will be realized. The tax expense for the three and nine months ended September 30, 2021 was due to foreign income tax expense, and the tax expense for the three and nine months ended September 30, 2020 was due to foreign and state income tax. The Company accounts for income taxes in accordance with ASC 740, Income Taxes, which requires that the Company recognizes deferred tax liabilities and assets based on the differences between the financial statement carrying amounts and the tax basis of assets and liabilities by using enacted tax rates expected to apply to taxable income in the periods in which the deferred tax liability or asset is expected to be settled or realized. The Company had a deferred tax liability of $6.8 million primarily related to basis difference in foreign intangible assets as of September 30, 2021. The net deferred tax impact was included in deferred tax assets on the Company’s condensed consolidated balance sheets.