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Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Revenues	$ 102,428	$ 84,452	$ 36,567
Operating expenses:
Research and development	145,922	114,866	65,728
General and administrative	61,686	46,736	27,200
Total operating expenses	207,608	161,602	92,928
Loss from operations	(105,180)	(77,150)	(56,361)
Interest and other income, net	9,761	8,261	1,793
Loss before income taxes	(95,419)	(68,889)	(54,568)
Benefit from income taxes	0	0	0
Net loss	(95,419)	(68,889)	(54,568)
Net loss attributable to non-controlling interest	(233)	(555)	0
Net loss attributable to Sangamo Therapeutics, Inc. stockholders	$ (95,186)	$ (68,334)	$ (54,568)
Basic and diluted net (loss) income per share attributable to Sangamo Therapeutics, Inc. (in dollars per share)	$ (0.85)	$ (0.70)	$ (0.70)
Shares used in computing basic and diluted net loss per share attributable to Sangamo Therapeutics, Inc. stockholders (in shares)	112,114	96,941	78,084

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