Restatement of Previously Issued Financial Statements - Schedule Of Condensed Income Statement (Detail) - $ / shares	3 Months Ended			4 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2020	Sep. 30, 2021	Dec. 31, 2020
Class A Common Stock
Weighted average shares outstanding of ordinary shares, basic and diluted			14,413,333	0	21,043,094	23,252,747	24,348,493
Basic and diluted net income (loss) per ordinary share	$ (0.33)	$ 0.04	$ 0.42	$ 0	$ 0.37	$ (0.03)	$ (0.34)
Class A Common Stock | Previously Restated
Weighted average shares outstanding of ordinary shares, basic and diluted			27,600,000		27,600,000	27,600,000
Basic and diluted net income (loss) per ordinary share	0	0	$ 0.06		$ 0.07	$ 0.07
Class A Common Stock | Adjustment
Weighted average shares outstanding of ordinary shares, basic and diluted			(13,186,667)		(6,556,906)	(4,347,253)
Basic and diluted net income (loss) per ordinary share	(0.33)	0.04	$ 0.36		$ 0.30	$ (0.10)
Class B common stock
Weighted average shares outstanding of ordinary shares, basic and diluted			6,900,000	6,000,000	6,900,000	6,900,000	6,900,000
Basic and diluted net income (loss) per ordinary share	(0.33)	0.04	$ 0.42	$ 0.00	$ 0.37	$ (0.03)	$ (0.34)
Class B common stock | Previously Restated
Weighted average shares outstanding of ordinary shares, basic and diluted			6,474,725		6,687,363	6,758,759
Basic and diluted net income (loss) per ordinary share	(1.63)	(0.20)	$ 1.12		$ 1.29	$ (0.39)
Class B common stock | Adjustment
Weighted average shares outstanding of ordinary shares, basic and diluted			425,275		212,637	141,241
Basic and diluted net income (loss) per ordinary share	$ 1.30	$ 0.24	$ (0.70)		$ (0.92)	$ 0.36