Stock Award Plans and Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price limit (percent)	100.00%
Exercise price limit for individuals owning over ten percent (percent)	110.00%
Options outstanding (in shares)	18,882,303	5,450,057	121,796
Granted (in shares)	14,285,629	5,567,500
2011 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	73	89	96
Granted (in shares)	0	0
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	40,000,000
Options outstanding (in shares)	18,882,229	5,449,967	121,699
Awards other than options outstanding (in shares)	4,182,692
Granted (in shares)	14,285,629	5,567,500
Non Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	1	1	1
Granted (in shares)	0	0
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period	4 years
Expiration period	10 years
Share-based payment charges	$ 2.3	$ 1.2
Options \| 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under award (in shares)	16,935,079

Share Based Compensation, Options, Grant Exercise Price Limit of Fair Value

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Share Based Compensation, Options, Grant Exercise Price Limit of Fair Value, 10 Percent Owner

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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