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Summary of Significant Accounting Policies - Schedule the Ordinary Shares reflected in the balance sheets (Detail) - Empower Ltd [Member] - USD ($)	4 Months Ended	6 Months Ended
	Dec. 31, 2020	Jun. 30, 2021
Temporary Equity [Line Items]
Gross proceeds	$ 250,000,000	$ 250,000,000
Proceeds allocated to Public Warrants	(8,500,000)	(8,500,000)
Class A ordinary share issuance costs	(13,732,278)	(13,732,278)
Accretion of carrying value to redemption value	22,285,184	22,344,543
Class A ordinary share subject to possible redemption	$ 250,052,906	$ 250,112,265

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
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