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v3.20.4

Subsequent Events (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Feb. 28, 2021 | Jan. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Subsequent Events |  |  |  |  |  |  |  |
Number of common stock issued |  |  | 6,900,000 |  |  |  |  |
Proceeds from offering of common stock, net of issuance costs |  |  | $ 203,700 |  | $ 203,726 | $ 116,341 | $ 76,789 |
Overallotment Option |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |
Number of common stock issued |  |  | 900,000 |  |  |  |  |
Broad | Sponsored Research Agreement |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |
Stock issued to licensors |  |  |  | 330,617 |  |  |  |
Market capitalization |  |  |  |  | $ 2,500,000 |  |  |
Broad, Massachusetts Institute of Technology, or MIT, and Harvard (Institutions) | Cas9-II License Agreement |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |
Market capitalization |  |  |  |  |  |  |  | $ 1,000,000
Subsequent Event | Public Offering |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |
Number of common stock issued |  | 3,500,000 |  |  |  |  |  |
Proceeds from offering of common stock, net of issuance costs |  | $ 216,900 |  |  |  |  |  |
Subsequent Event | Overallotment Option |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |
Number of stock upon exercise of option | 525,000 |  |  |  |  |  |  |
Proceeds from offering of common stock, net of issuance costs | $ 32,600 |  |  |  |  |  |  |
Subsequent Event | Broad | Sponsored Research Agreement |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |
Stock issued to licensors |  | 303,599 |  |  |  |  |  |
Subsequent Event | Broad, Massachusetts Institute of Technology, or MIT, and Harvard (Institutions) | Cas9-II License Agreement |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |
Market capitalization |  | $ 3,000,000 |  |  |  |  |  |

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