Equity Incentive Plans and Stock-Based Compensation - Additional Information (Details) - USD ($)		1 Months Ended			12 Months Ended
	Jun. 10, 2021	Sep. 30, 2022	Nov. 30, 2021	Feb. 28, 2021	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance					166,884,802	144,601,515
Granted					4,866,230
Weighted-average grant date fair values of options granted					$ 2.42	$ 4.44	$ 3.02
Intrinsic value of vested options exercised					$ 4,600,000	$ 25,600,000	$ 47,600,000
Unrecognized stock-based compensation cost					$ 65,900,000
Weighted average period over which unrecognized compensation is expected to be recognized					2 years 6 months
Stock-based compensation expense					$ 116,017,000	57,933,000	86,696,000
Proceeds from exercise of stock options					$ 4,203,000	$ 16,998,000	76,151,000
Issuance of common stock related to early exercise of stock options, shares					2,748,796
Common stock subject to repurchase					0	0
Total liabilities					$ 228,659,000	$ 236,412,000
Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Unrecognized stock-based compensation cost					28,400,000
Weighted average period over which unrecognized compensation is expected to be recognized						2 years 7 months 6 days
Common stock granted subject to vest, Weighted average grant date fair value			$ 43,900,000
General and Administrative [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense					40,400,000
General and Administrative [Member] | Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense					11,000,000.0	$ 4,500,000
General and Administrative [Member] | Secondary Sale Transaction [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense					47,671,000	22,242,000	59,986,000
Stock Option Activity [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Tax benefit recognized from stock option exercises					0	$ 0	0
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation cost					$ 116,800,000
Weighted average period over which unrecognized compensation is expected to be recognized					3 years
Early Exercise of Common Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options Exercised					0	0
Early Exercise of Common Stock Options [Member] | Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted					6,881,095
Proceeds from exercise of stock options		$ 34,700,000					$ 47,200,000
Issuance of common stock related to early exercise of stock options, shares		6,881,095					11,108,906
Common stock subject to repurchase				15,621,041
2021 Incentive Equity Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exchange ratio of common stock					2.293698169
Shares Available for Grant, Beginning balance					22,839,019
Exercise price of stock options as a percentage of fair value of shares					110.00%
Share-based payment award, description					The number of shares of Class A common stock reserved for issuance under the 2021 Plan will automatically increase on January 1 of each calendar year, starting in 2022, in an amount equal to (i) 22,839,019 shares of Class A common stock, (ii) 3.0% of the aggregate number of shares of Class A common stock and Class B common stock outstanding, or (iii) a lesser number of shares determined by the Company’s Board of Directors prior to the applicable January 1.
Share-based payment award, expiration period					10 years
Share-based compensation terms of award					Options under the 2021 Plan 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.
2021 Incentive Equity Plan [Member] | Stock Option Activity [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of total stock holding					10.00%
2021 Incentive Equity Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issued and outstanding, percentage					3.00%
2021 Incentive Equity Plan [Member] | Minimum [Member]
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%
ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issued and outstanding, percentage	(1.00%)
Weighted-average grant date fair values of options granted					$ 1.35	$ 1.84
Potential annual increase in shares reserved for future issuance	5,000,000
Payroll deductions to participate in plan					15.00%
2006 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted					0
2022 AIP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense					$ 18,900,000
Other current liabilities					$ 18,900,000
Class A Common Stock [Member] | Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock granted subject to vest			3,747,027
Class A Common Stock [Member] | 2021 Incentive Equity Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance	136,000,000
Exchange ratio of common stock					2.293698169
Class A Common Stock [Member] | 2021 Incentive Equity Plan [Member] | Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance			2,990,386		55,922,182
Class A Common Stock [Member] | 2021 Incentive Equity Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance	136,000,000
Class A Common Stock [Member] | ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance	11,420,000				16,349,302
Discount from market price, offering date					85.00%
Discount from market price, purchase date					85.00%
Maximum value of shares per employee					$ 25,000
Number of shares issued					2,642,313
Class B Common Stock [Member] | Early Exercise of Common Stock Options [Member] | Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Proceeds from exercise of stock options				$ 32,600,000
Issuance of common stock related to early exercise of stock options, shares				11,029,071