Fair Value Measurements - Schedule of Fair Value of Financial Instruments Measured on Recurring Basis (Details) - Fair Value Recurring - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	$ 237,000	$ 372,000
Level 1
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	237,000	372,000
Level 2
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Level 3
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Money market funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	237,000	372,000
Money market funds | Level 1
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	237,000	372,000
Money market funds | Level 2
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Money market funds | Level 3
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	$ 0	$ 0