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Employee retirement plan | 12 Months Ended
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Dec. 31, 2021
Retirement Benefits [Abstract] |
Employee retirement plan | Employee retirement planThe Company maintains a 401(k) retirement savings plan covering eligible employees. Employee contributions to the plan consist of a percentage based on eligible employee compensation. The Company matches 25% of an employee’s contribution up to 6% of the employee’s compensation, with a cap of $500 annually, subject to a two-year graded vesting schedule that vests 50% after an employee’s first year of employment and 100% after two years of employment. The Company contributed $0.4 million, $0.2 million and $0.2 million for fiscal years ended December 31, 2021, 2020, and 2019, respectively.

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