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Share-Based Compensation - Share Options Narratives (Details) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2021 USD ($) shares	Sep. 30, 2021 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award
Share based compensation not yet recognized for unvested shares | $	$ 7.1	$ 7.1
Share based compensation not yet recognized for unvested shares vesting period		2 years 8 months 15 days
Granted (in shares)		2,678,175
Share options
Share-based Compensation Arrangement by Share-based Payment Award
Weighted average grant date fair value (usd per share) | $ / shares		$ 5.45
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation arrangement by share-based payment award, shares issued in period		1,602,500
Share-based Payment, Options, Performance Condition
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation arrangement by share-based payment award, options, forfeitures in period		212,500
Granted (in shares)		80,000
Share-based compensation arrangement by share-based payment award, options,, vested, number of shares	80,000

X

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

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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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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of shares issued under share-based payment arrangement.

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Number of options vested.

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