Equity Incentive Plans and Stock-Based Compensation - Summary of the Value Stock Options and ESPP Assumptions (Details)	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility rate, minimum	67.00%	78.00%	77.00%
Expected volatility rate, maximum	99.00%	109.00%	86.00%
Expected weighted-average volatility	70.00%	96.00%	82.00%
Risk free interest rate, minimum	4.90%	3.30%	0.60%
Risk free interest rate, maximum	5.50%	5.20%	0.90%
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility rate, minimum	78.00%	76.00%	72.00%
Expected volatility rate, maximum	79.00%	81.00%	75.00%
Expected weighted-average volatility	79.00%	79.00%	74.00%
Risk free interest rate, minimum	3.60%	2.80%	1.00%
Risk free interest rate, maximum	4.40%	4.20%	2.50%
Minimum \| ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	6 months	6 months	6 months
Expected dividend yield	0.00%	0.00%	0.00%
Minimum \| Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	5 years 9 months 18 days	6 years	3 years 3 months 18 days
Expected dividend yield	0.00%	0.00%	0.00%
Maximum \| ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	1 year	1 year	1 year
Expected dividend yield	0.00%	0.00%	0.00%
Maximum \| Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	6 years	6 years 9 months 18 days	6 years 1 month 6 days
Expected dividend yield	0.00%	0.00%	0.00%

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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Rate of weighted-average expected volatility for award under share-based payment arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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