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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Equity Incentive Plans and Stock-Based Compensation - Additional Information (Details)		1 Months Ended				12 Months Ended
	Jun. 10, 2021 shares	Nov. 30, 2021 USD ($) shares	Feb. 28, 2021 USD ($) shares	Sep. 30, 2020 USD ($) shares	Aug. 31, 2020 shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance						144,601,515	278,819,076
Exchange ratio of common stock						2.293698169
Stock Options, Granted						14,968,952
Shares Available for Grant, Exercised						5,808,526
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.
Weighted-average grant date fair values of options granted \| $ / shares						$ 4.44	$ 3.02	$ 2.73
Intrinsic value of vested options exercised \| $						$ 25,600	$ 47,600,000	$ 19,000.0
Weighted average period over which unrecognized compensation is expected to be recognized						2 years 9 months 18 days
Unrecognized stock-based compensation expense \| $						$ 104,100
Stock-based compensation expense \| $						57,933,000	86,696,000	41,058,000
Proceeds from stock options exercised \| $						$ 16,998,000	$ 76,151,000	8,830,000
Common stock subject to repurchase						0	0
Options Exercised						0	0
Vesting Early Exercised Stock Options \| $						$ 0	$ 91,046,000	16,962,000
Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period over which unrecognized compensation is expected to be recognized						3 years 7 months 6 days
Common stock granted subject to vest		3,747,027
Unrecognized stock-based compensation expense \| $						$ 39,400,000
Common stock granted subject to vest, Weighted average grant date fair value \| $		$ 43,900,000
Vesting peiod		4 years
General and Administrative Expense [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense \| $			$ 40,400,000			22,242,000	$ 59,986,000	$ 18,932,000
General and Administrative Expense [Member] \| Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense \| $						$ 4,500,000
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period over which unrecognized compensation is expected to be recognized						3 years 6 months
Unrecognized stock-based compensation expense \| $						$ 96,000,000.0
Early Exercise of Common Stock Options [Member] \| CEO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Options, Granted					6,881,095
Shares Available for Grant, Exercised				6,881,095			11,108,906
Proceeds from stock options exercised \| $				$ 34,700,000			$ 47,200,000
Shares Vested			15,621,041
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
Shares Available for Grant, Beginning balance						22,839,019
Common stock issued and outstanding, percentage						3.00%
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
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
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]
Shares reserved for future issuance	136,000,000
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]
Shares reserved for future issuance	11,420,000
Common stock issued and outstanding, percentage	(1.00%)
Potential annual increase in shares reserved for future issuance	5,000,000
Number of shares issued						0
Amount withheld \| $						$ 600,000
2006 Equity Incentive Plan \| Performance Based Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Options, Granted						0
Class B Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock subject to repurchase								8,739,945
Weighted Average Repurchase Price \| $ / shares								$ 11.50
Class B Common Stock [Member] \| CEO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Available for Grant, Exercised			11,029,071
Proceeds from stock options exercised \| $			$ 32,600,000