Equity Incentive Plans and Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		6 Months Ended
	Nov. 01, 2023 USD ($)	Jun. 10, 2021 shares	Nov. 30, 2021 USD ($) shares	Sep. 30, 2023 USD ($) shares	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares	Mar. 31, 2023 USD ($) shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance				221,253,765		221,253,765		163,884,802
Granted						13,097,016
Weighted-average grant date fair values of options granted | $ / shares						$ 0.87	$ 2.54
Intrinsic value of vested options exercised | $						$ 1,000	$ 4,100
Unrecognized stock-based compensation cost | $				$ 82,500		$ 82,500
Weighted average period over which unrecognized compensation is expected to be recognized						2 years 7 months 6 days
Stock-based compensation expense | $				23,741	$ 28,967	$ 74,840	59,430
Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Common stock granted subject to vest			3,747,027
Common stock granted subject to vest, Weighted average grant date fair value | $			$ 43,900
General and Administrative [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $						22,000
General and Administrative [Member] | Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $				400	2,800	25,100	5,500
General and Administrative [Member] | Relinquishment Triggering Event [Member] | Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $	$ 3,100
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Tax benefit recognized from stock option exercises | $				0	0	0	0
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation cost | $				$ 103,100		$ 103,100
Weighted average period over which unrecognized compensation is expected to be recognized						2 years 8 months 12 days
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option vest, term						4 years
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option vest, term						3 years
2021 Incentive Equity Plan [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						110.00%
Share-based payment award, expiration period						10 years
Share-based compensation terms of award						Options under the A&R 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] | Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of total stock holding				10.00%		10.00%
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
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issued and outstanding, percentage		(1.00%)
Potential annual increase in shares reserved for future issuance		5,000,000
2006 Equity Incentive Plan [Member]
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 | $				$ 2,400	$ 4,800	$ 6,800	$ 9,700
Other current liabilities | $				$ 8,000		$ 8,000		$ 18,900
A&R Plan [Member] | Maximum [Member] | Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance shares of increase annual percentage						5.00%
A&R Plan [Member] | Minimum [Member] | Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance shares of increase annual percentage						3.00%
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] | ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance		11,420,000		11,839,766		11,839,766
Number of shares issued						4,151,849
Class A Common Stock [Member] | 2022 AIP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock upon release of restricted stock units, shares						8,961,053
Class A Common Stock [Member] | A&R Plan [Member] | Lemonaid Health, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance				209,413,999		209,413,999
Class A Common Stock [Member] | A&R Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Available for Grant, Beginning balance				75,000,000		75,000,000
Class A Common Stock [Member] | A&R Plan [Member] | Maximum [Member] | Lemonaid Health, Inc. [Member] | Non-Employee Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance				400,000		400,000
Class A Common Stock [Member] | A&R Plan [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Available for Grant, Beginning balance				75,000,000		75,000,000
Class A Common Stock [Member] | A&R Plan [Member] | Minimum [Member] | Lemonaid Health, Inc. [Member] | Non-Employee Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance				300,000		300,000