Amount of cost for defined contribution plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

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.

+ References

No definition available.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

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- Definition

Defined Contribution Plan, Employer Matching Contribution, Percent Of Employee Contribution

+ References

No definition available.

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Employee Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Mainland China Government Plan
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	$ 23.6	$ 17.6	$ 4.4
401(k) Plan
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	$ 0.5	0.0	0.0
Employer matching contribution percentage	50.00%
Percentage of employee contribution that the employer matches	5.00%
Mandatory Provident Fund
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	$ 0.2	$ 0.0	$ 0.0
Maximum \| 401(k) Plan
Defined Contribution Plan Disclosure [Line Items]
Percentage of employees eligible compensation the employer matches	2.50%