Equity Incentive Plans and Stock-Based Compensation - Summary of the Stock-Based Compensation (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense		$ 23,741	$ 28,967	$ 74,840	$ 59,430
General and Administrative [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense				22,000
Secondary Sale Transaction [Member] | Cost of Revenue [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense		1,497	2,413	3,969	5,740
Secondary Sale Transaction [Member] | Research and Development [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense		10,938	12,003	22,630	24,079
Secondary Sale Transaction [Member] | Sales and Marketing [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense		2,016	2,003	3,734	4,892
Secondary Sale Transaction [Member] | General and Administrative [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	[1]	9,290	12,548	43,866	24,719
Secondary Sale Transaction [Member] | Restructuring and Other Charges [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense		$ 0	$ 0	$ 641	$ 0

[1] Includes $22.0 million of stock-based compensation expense related to the termination of a Former Lemonaid Officer during the six months ended September 30, 2023.