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401 (k) Savings Plan | 12 Months Ended
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Dec. 31, 2021
Retirement Benefits [Abstract] |
401(k) Savings Plan | 13. 401(k) Savings Plan The Company established a defined‑contribution savings plan under Section 401(k) of the Internal Revenue Code (the “401(k) Plan”) in November 2016. The 401(k) Plan covers all employees who meet defined minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pretax basis. The Company contributed $3.4 million, $1.9 million, and $1.1 million to the 401(k) Plan for the year ended December 31, 2021, 2020 and 2019, respectively.

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