Employee Defined-Contribution Plans (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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| Retirement Benefits [Abstract] | ||||
| Percentage of contributions that fully vest | 100.00% | |||
| Employer contribution, percentage of employee's eligible compensation | 3.00% | |||
| Contributions | $ 0.2 | $ 0.1 | $ 0.4 | $ 0.3 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cost for defined contribution plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available.
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| X | ||||||||||
- Definition Percentage of employer's matching contributions to a defined contribution plan that vests in a given year. No definition available.
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