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Acquisition of Quellis (Details) $ in Thousands |  | 9 Months Ended |
--- | --- | --- | ---
Jan. 28, 2021 USD ($) shares | Sep. 30, 2021 shares | Jun. 02, 2021
Common stock |  |  |
Acquisition of Quellis |  |  |
Issuance of common stock upon acquisition of Quellis (in shares) |  | 555,444 |
Quellis Biosciences, Inc |  |  |
Acquisition of Quellis |  |  |
Cost to acquire the assets | $ | $ 170,681 |  |
Acquisition costs | $ | $ 1,800 |  |
Quellis Biosciences, Inc | Common stock |  |  |
Acquisition of Quellis |  |  |
Issuance of common stock upon acquisition of Quellis (in shares) | 555,444 |  |
Series X redeemable convertible preferred stock |  |  |
Acquisition of Quellis |  |  |
Issuance of preferred stock upon acquisition of Quellis (in shares) |  | 50,504 |
Number of shares of common stock into which each share of Series X Preferred Stock may be converted |  | 166.67 | 166.67
Series X redeemable convertible preferred stock | Quellis Biosciences, Inc |  |  |
Acquisition of Quellis |  |  |
Issuance of preferred stock upon acquisition of Quellis (in shares) | 50,504 |  |
Number of shares of common stock into which each share of Series X Preferred Stock may be converted | 166.67 | 166.67 |

X
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