Subsequent events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Jan. 01, 2022	Nov. 16, 2021
Subsequent Event [Member]
Subsequent Event [Line Items]
Sharebased compensation arrangement share options granted during period	2,571,875
Sharebased compensation arrangement share options granted share price per share	$ 3.79
Sharebased compensation arrangement share options granted vesting period	4 years
Share based compensation arrangement share options granted fair value per share	$ 2.92
Sharebased compensation arrangement compensation cost not recognized	$ 7,519
Common stock exchange ratio	1.45823
Sponsor [Member] \| Promissory Note [Member] \| Kensington Capital Acquisition Corp I V [Member]
Subsequent Event [Line Items]
Maturity date		Dec. 31, 2021
Sponsor [Member] \| Amended Promissory Note [Member] \| Kensington Capital Acquisition Corp I V [Member]
Subsequent Event [Line Items]
Maturity date		Jun. 30, 2022

Common stock exchange ratio.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

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-Name Accounting Standards Codification
-Topic 718
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- Definition

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.

+ References

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- Definition

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

+ References

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-Name Accounting Standards Codification
-Topic 718
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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.

+ References

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-Name Accounting Standards Codification
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- Definition

Per share weighted-average price paid for shares purchased on open market for issuance under share-based payment arrangement.

+ References

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-Name Accounting Standards Codification
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- Definition

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.

+ References

No definition available.

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