Equity Incentive Plans and Stock-Based Compensation - Summary of the Stock-Based Compensation (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) formerEmployee	Dec. 31, 2022 USD ($)
Employee Service Share-Based Compensation Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 26,357	$ 34,338	$ 101,198	$ 93,768
Former Lemonaid Officer
Employee Service Share-Based Compensation Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	10,800		$ 32,800
Former employees | formerEmployee			2
Secondary Sale Transaction | Cost of revenue
Employee Service Share-Based Compensation Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,024	3,200	$ 4,993	8,940
Secondary Sale Transaction | Research and development
Employee Service Share-Based Compensation Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	6,250	15,188	28,880	39,267
Secondary Sale Transaction | Sales and marketing
Employee Service Share-Based Compensation Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,095	2,444	4,829	7,336
Secondary Sale Transaction | General and administrative
Employee Service Share-Based Compensation Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	17,007	13,506	60,873	38,225
Secondary Sale Transaction | Restructuring and other charges
Employee Service Share-Based Compensation Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 981	$ 0	$ 1,623	$ 0