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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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- Definition 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 + Details
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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 + Details
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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