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Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Summary of Quarterly Financial Data | The following table sets forth certain unaudited quarterly financial data for the eight quarters ended December 31, 2020. The unaudited information set forth below has been prepared on the same basis as the audited information contained herein and includes all adjustments necessary to present fairly the information set forth. The operating results for any quarter are not indicative of results for any future period. All amounts are in thousands except per share amounts.
| 2020 |  | 2019
| Q1 |  | Q2 |  | Q3 |  | Q4 |  | Q1 |  | Q2 |  | Q3 |  | Q4
Revenues | $ | 13,076 |  |  | $ | 21,553 |  |  | $ | 57,763 |  |  | $ | 25,800 |  |  | $ | 8,071 |  |  | $ | 17,548 |  |  | $ | 21,958 |  |  | $ | 54,851 |
Operating expenses | $ | 57,598 |  |  | $ | 59,450 |  |  | $ | 61,464 |  |  | $ | 69,232 |  |  | $ | 51,968 |  |  | $ | 51,052 |  |  | $ | 51,206 |  |  | $ | 53,382 |
Net (loss) income | $ | (42,974) |  |  | $ | (35,965) |  |  | $ | (1,508) |  |  | $ | (40,675) |  |  | $ | (42,203) |  |  | $ | (30,356) |  |  | $ | (27,361) |  |  | $ | 4,501 |
Net (loss) income attributable to non-controlling interest | $ | (61) |  |  | $ | (36) |  |  | $ | 42 |  |  | $ | (71) |  |  | $ | (53) |  |  | $ | (72) |  |  | $ | (54) |  |  | $ | (54) |
Net (loss) income attributable to Sangamo Therapeutics, Inc. | $ | (42,913) |  |  | $ | (35,929) |  |  | $ | (1,550) |  |  | $ | (40,604) |  |  | $ | (42,150) |  |  | $ | (30,284) |  |  | $ | (27,307) |  |  | $ | 4,555 |
Basic and diluted net (loss) income per share attributable to Sangamo Therapeutics, Inc. | $ | (0.37) |  |  | $ | (0.26) |  |  | $ | (0.01) |  |  | $ | (0.29) |  |  | $ | (0.41) |  |  | $ | (0.26) |  |  | $ | (0.24) |  |  | $ | 0.04 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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