Recurring Fair Value Measurements - Summary of model for the FPA liability (Detail) - yr	Aug. 23, 2021	Sep. 30, 2020
Measurement Input Probability of Successful Business Combination [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability Weighted Expected Return	85.00%	85.00%
Measurement Input Likelihood Year One [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability Weighted Expected Return	25.00%	25.00%
Measurement Input Likelihood Year Two [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability Weighted Expected Return	50.00%	50.00%
Measurement Input Likelihood Year Three [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability Weighted Expected Return	25.00%	25.00%
Measurement Input, Risk Free Interest Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability Weighted Expected Return	0.09%	0.16%
Measurement Input, Share Price [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	10.00	10.00
Measurement Input, Expected Term [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	1.10	1.37
Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability Weighted Expected Return	14.00%	14.00%