Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Millions		6 Months Ended	12 Months Ended
	Feb. 06, 2023 USD ($)	Sep. 30, 2023 Vote $ / shares shares	Mar. 31, 2023 shares
Class Of Stock [Line Items]
Stock split description		Each share of Class B common stock is convertible into one share of Class A common stock any time at the option of the holder and is automatically converted into one share of Class A common stock upon transfer
Proceeds from sales agent commission percentage	3.00%
VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Lockup Period		7 years	7 years
Earn Out Shares, Percentage		50.00%
Class A Common Stock [Member]
Class Of Stock [Line Items]
Number of votes | Vote		1
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Earnout Shares | shares		3,814,125	3,814,125
Trading days		20 days
Earn Out Shares, Percentage		50.00%
Number of trading days after commencing		30 days
Class B Common Stock [Member]
Class Of Stock [Line Items]
Number of votes | Vote		10
Maximum [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Share Price Thresholds Release From Lock Up | $ / shares		$ 15
Maximum [Member] | Cowen and Company LLC [Member] | Sales Agreement [Member]
Class Of Stock [Line Items]
Aggregate principal amount | $	$ 150
Minimum [Member] | Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Share Price Thresholds Release From Lock Up | $ / shares		$ 12.5