Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands					12 Months Ended
	Feb. 06, 2023 USD ($)	Dec. 22, 2021 USD ($) $ / shares shares	Jun. 16, 2021 Vote $ / shares shares	Feb. 04, 2021 $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2023 shares
Class Of Stock [Line Items]
Redeemable convertible preferred stock, Shares, Outstanding | shares					0	0
Common Stock, Par value					$ 0.0001	$ 0.0001
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		The shares and net loss per common share prior to the Merger have been retroactively restated as shares reflecting the exchange ratio established in the Merger. See Note 3, “Recapitalization,” for additional details.
Common stock, shares authorized | shares			1,490,000,000
Preferred stock, shares authorized | shares					10,000,000	10,000,000
Preferred stock, par value					$ 0.0001	$ 0.0001
Preferred stock, shares issued | shares					0	0
Preferred stock, shares outstanding | shares					0	0
Warrants outstanding | shares						0		0
Proceeds from issuance of common stock under employee stock purchase plan | $					$ 6,464
Number of Redeemed Warrants Redemption Payment Made To | shares		1,164,142
Change in fair value of warrant liabilities | $					$ 0	$ 32,989	$ 0
Description of warrant redemption		Warrants were exercised, representing approximately 95% of the outstanding Warrants
Class of warrants or rights redemption price per warrant		$ 0.10
Proceeds from sales agent commission percentage	3.00%
Public Warrants and Private Placement Warrants [Member]
Class Of Stock [Line Items]
Warrants exercised | shares		23,901,466
VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Lockup Period				7 years
Earn Out Shares, Percentage				50.00%
Sale of Stock, Description of Transaction				(i) with respect to 50% of the Earn-Out Shares, upon the closing price of the Company’s Class A common stock equaling or exceeding $12.50 per share for any 20 trading days within any 30-trading-day period, and (ii) with respect to the other 50% of the Earn-Out Shares, upon the closing price of the Company’s Class A common stock equaling or exceeding $15.00 per share for any 20 trading days within any 30-trading-day period; provided that the transfer restrictions applicable to the Earn-Out Shares will terminate on the date following the closing date on which the Company completes a liquidation, merger, amalgamation, capital stock exchange, reorganization, or other similar transaction that results in all of the Company’s public stockholders having the right to exchange their shares of Class A common stock for cash, securities, or other property (a “Liquidation Event”), if such Liquidation Event occurs prior to the date that the stock price thresholds referenced in (i) and (ii) are met.
Class A Common Stock [Member]
Class Of Stock [Line Items]
Common Stock, Par value			$ 0.0001
Exchange Ratio			2.293698169
Common stock, shares authorized | shares			1,140,000,000		1,140,000,000	1,140,000,000
Number of votes | Vote			1
Common Stock, Shares, Issued | shares		6,016,327			293,020,474	228,174,718
Common Stock, Shares, Outstanding | shares					293,020,474	228,174,718
Exercise price		$ 11.50
Trading days				20 days
Share Redemption Trigger Price					$ 18.00
Exchange ratio for shares of Class A common stock per warrant		0.2516
Number Of Trading Days				20 days
Number of trading days after commencing				30 days
Class A Common Stock [Member] | Private Placement Warrants
Class Of Stock [Line Items]
Number of Days after the completion of an initial business combination					30 days
Class of Warrant or Right Redemption Threshold Trading Days					10 days
Class of warrants or rights redemption price per warrant					$ 10.00
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Expiry date					5 years
Trading days				20 days
Number Of Trading Days				20 days
Common stock, Price Per Share				$ 10.00
Number of trading days after commencing				30 days
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member] | Private Placement Warrants
Class Of Stock [Line Items]
Number of Warrants | shares						8,113,999
Exercise price					$ 11.50
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member] | Public Warrants [Member]
Class Of Stock [Line Items]
Number of Warrants | shares					16,951,609
Exercise price					$ 11.50
Class A Common Stock [Member] | Lemonaid Acquisition [Member]
Class Of Stock [Line Items]
Common Stock, Shares, Issued | shares					26,825,241
Common stock shares subscribed | shares					3,747,027
Class B Common Stock [Member]
Class Of Stock [Line Items]
Exchange Ratio					2.293698169
Common Stock, Par value			$ 0.0001
Exchange Ratio			2.293698169
Common stock, shares authorized | shares			350,000,000		350,000,000	350,000,000
Number of votes | Vote			10
Common Stock, Shares, Issued | shares					168,179,488	220,637,603
Common Stock, Shares, Outstanding | shares					168,179,488	220,637,603
Class B Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Common Stock, Shares, Outstanding | shares				3,814,125
Class B Common Stock [Member] | VGAC [Member]
Class Of Stock [Line Items]
Acquired ownership percentage				30.00%
Maximum [Member]
Class Of Stock [Line Items]
Class of warrants or rights redemption price per warrant		$ 0.10
Maximum [Member] | Cowen and Company LLC [Member] | Sales Agreement [Member]
Class Of Stock [Line Items]
Sale of Securities over a period of time | $	$ 500,000
Aggregate principal amount | $	$ 150,000
Maximum [Member] | Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Share Price Thresholds Release From Lock Up				$ 15.00
Minimum [Member] | Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Share Price Thresholds Release From Lock Up				$ 12.50
Additional Paid In Capital [Member]
Class Of Stock [Line Items]
Change in fair value of warrant liabilities | $		$ 42,400				$ 33,000
Share Price Less Than Dollar Eighteen And Greater Than Or Equals To Ten Point Zero Zero | Class A Common Stock [Member] | Public Warrants [Member]
Class Of Stock [Line Items]
Exercise price					$ 0.10
Share Redemption Trigger Price					$ 10.00
Class of warrants redemption notice period					30 days
Share Price Less Than Dollar Eighteen And Greater Than Or Equals To Ten Point Zero Zero | Minimum [Member] | Class A Common Stock [Member] | Public Warrants [Member]
Class Of Stock [Line Items]
Exercise price					$ 18.00
Share Price Equals Or Exceeds Dollar Eighteen | Class A Common Stock [Member] | Public Warrants [Member]
Class Of Stock [Line Items]
Exercise price					$ 0.01
Class of Warrant or Right Redemption Threshold Consecutive Trading Days					20 days
Class of Warrant or Right Redemption Threshold Trading Days					30 days
Share Redemption Trigger Price					$ 18.00
Class of warrants redemption notice period					30 days