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Fair value measurements - Summary financial assets measured at fair value on a recurring basis (Detail) - USD ($)	Mar. 31, 2022	Feb. 14, 2022	Feb. 09, 2022	Feb. 04, 2022	Dec. 31, 2021	Dec. 31, 2020
Convertible Promissory Note [Member]
Liabilities
Convertible promissory note	$ 72,800	$ 14,800	$ 27,600	$ 29,600
Level 3
Liabilities
Warrant liability	3,134,466				$ 4,063,666	$ 0
Level 3 | Convertible Promissory Note [Member]
Liabilities
Convertible promissory note		$ 14,800	$ 27,600	$ 29,600
Money Market investments
Assets
Money market investments	317,582,318				317,581,791
Money Market investments | Level 1
Assets
Money market investments	317,582,318				317,581,791
Money Market investments | Level 3
Assets
Money market investments
Public Warrants
Liabilities
Warrant liability	4,365,625				5,715,000
Public Warrants | Level 1
Liabilities
Warrant liability	4,365,625				5,715,000
Public Warrants | Level 3
Liabilities
Warrant liability
Private Placement Warrants
Liabilities
Warrant liability	3,061,666				4,063,666
Private Placement Warrants | Level 1
Liabilities
Warrant liability
Private Placement Warrants | Level 3
Liabilities
Warrant liability	$ 3,061,666				$ 4,063,666

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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