Equity Incentive Plans and Stock-Based Compensation - Additional Information (Details)						1 Months Ended	12 Months Ended
	Sep. 06, 2023 USD ($) shares	Sep. 05, 2023 USD ($)	Nov. 01, 2021 shares	Jun. 16, 2021	Jun. 10, 2021 shares	Nov. 30, 2021 USD ($) stockholder shares	Mar. 31, 2024 USD ($) officer non-employeeDirector tradingDay $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance (in shares) | shares							238,918,589	163,884,802
Granted (in shares) | shares							13,097,016
Stock-based compensation expense							$ 120,209,000	$ 116,017,000	$ 57,933,000
Weighted-average grant date fair values of options granted (in usd per share) | $ / shares							$ 0.87	$ 2.42	$ 4.44
Intrinsic value of vested options exercised							$ 1,400,000	$ 4,600,000	$ 25,600,000
Unrecognized stock-based compensation cost							$ 28,100,000
Weighted average period over which unrecognized compensation is expected to be recognized							2 years 2 months 12 days
Shares issued, weighted average exercise price (usd per share) | $ / shares							$ 0.61
Lemonaid Health, Inc.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						4 years
Common stock granted subject to vest, weighted average grant date fair value						$ 43,900,000
Former officers terminated | officer							2
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Tax benefit recognized from stock option exercises							$ 0	0	0
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grants (in shares) | shares							50,324,367
Weighted average period over which unrecognized compensation is expected to be recognized							2 years 3 months 18 days
Stock-based compensation expense, unrecognized cost							$ 90,900,000
Former Lemonaid Officer | Lemonaid Health, Inc.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation cost							0
Former Lemonaid Officer | General and administrative | Lemonaid Health, Inc.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense							28,400,000	11,000,000	$ 4,500,000
Former Lemonaid Officer | Restricted Stock Units | General and administrative | Lemonaid Health, Inc.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense							$ 25,100,000
2006 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted (in shares) | shares							0
A and R Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exchange ratio of common stock	2.293698169
Percentage of shares automatically added annually	5.00%	3.00%
Non-employee directors that elected to convert all cash compensation into RSU awards | non-employeeDirector							4
Non-employee directors that elected to defer settlement of RSU awards | non-employeeDirector							2
A and R Plan | Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation terms of award	Options have a contractual life of up to ten years. The exercise price of a stock option shall not be less than 100% of the estimated fair value of the shares on the date of grant, as determined by the Board of Directors.
Share-based payment award, expiration period	10 years
Shares of common stock received for each option exercised	1
A and R Plan | Stock Options | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise price of stock options as a percentage of fair value of shares	100.00%
Vesting period	3 years
A and R Plan | Stock Options | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	4 years
A and R Plan | Restricted Stock Units | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	1 year
A and R Plan | Restricted Stock Units | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	4 years
A and R Plan | Share-Based Payment Arrangement, Nonemployee | Director
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Annual compensation limit	$ 400,000	$ 300,000
2022 Annual Incentive Plan | Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grants (in shares) | shares							9,019,049
Stock-based compensation expense							$ 5,800,000	18,900,000
Liability for awards							$ 6,500,000	$ 18,900,000
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential annual increase in shares reserved for future issuance | shares					5,000,000
Shares issued (in shares) | shares							5,329,571	2,642,313	0
Shares issued, weighted average exercise price (usd per share) | $ / shares								$ 2.45
Weighted average grant date fair value (in usd per share) | $ / shares							$ 0.44	$ 1.35	$ 1.84
ESPP | Employee Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issued and outstanding, percentage					(1.00%)
ESPP concurrent offering period							12 months
ESPP successive purchase period							6 months
Common Stock Class A | Lemonaid Health, Inc.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock granted subject to vest (in shares) | shares			3,747,027			3,747,027
Common Stock Class A | Former Lemonaid Officer | Lemonaid Health, Inc.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Former stockholders of acquiree who were granted shares | stockholder						2
Common Stock Class A | 2021 Incentive Equity Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance (in shares) | shares					136,000,000
Exchange ratio of common stock				2.293698169
Common Stock Class A | A and R Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional shares authorized (in shares) | shares	75,000,000
Common Stock Class A | 2022 Annual Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Days preceding date of payment | tradingDay							20
Common Stock Class A | ESPP | Employee Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance (in shares) | shares					11,420,000
Participants holding combined voting percentage that are excluded from plan participation							5.00%
Payroll deductions to participate in plan percentage (up to)							15.00%
Purchase price of common stock, percent							85.00%
Maximum value of shares employee may purchase							$ 25,000