Amount of cash outflow to acquire investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as investing activity.

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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 grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent events (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Feb. 28, 2022	Feb. 15, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Purchases of strategic investments			$ 10,000	$ 0	$ 0
Restricted Stock Units (RSUs)
Subsequent Event [Line Items]
Granted (in shares)			2,569,153
Granted (in USD per share)			$ 27.64
Subsequent Event
Subsequent Event [Line Items]
Purchases of strategic investments	$ 5,000
Subsequent Event \| Restricted Stock Units (RSUs)
Subsequent Event [Line Items]
Granted (in shares)		1,683,039
Granted (in USD per share)		$ 14.32
Award vesting period (in years)		4 years