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Fair Value Measurements - Summary of key inputs into the monte carlo simulation model for the private placement warrants and public warrants (Details)		3 Months Ended		4 Months Ended	6 Months Ended
	Oct. 09, 2020 USD ($) $ / shares	Sep. 26, 2021	Mar. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($) $ / shares	Jun. 30, 2021 USD ($) $ / shares	Oct. 09, 2021 $ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Expected volatility		40.30%
Exercise price						$ 11.50
Measurement Input, Exercise Price | Empower Ltd [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Risk-free interest rate	0.45%		0.98%	0.51%	0.88%
Trading days per year | $	252		252	252	252
Expected volatility	17.50%		17.40%	16.50%	27.20%
Exercise price	$ 11.50		$ 11.50	$ 11.50	$ 11.50
Stock price	$ 9.54		$ 9.98	$ 10.01	$ 10.01

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Number of trading days per year.

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Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

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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.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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Price of a single share of a number of saleable stocks of a company.

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