Equity Incentive Plans and Stock-Based Compensation - Schedule of Weighted Average Black-Scholes Assumptions (Details)	3 Months Ended	6 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
A And R ESPP
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected volatility range, minimum	76.00%	67.00%	76.00%	67.00%
Expected volatility range, maximum	77.00%	73.00%	77.00%	73.00%
Expected weighted-average volatility	76.00%	70.00%	76.00%	70.00%
Risk-free interest rate, minimum	4.40%	5.40%	4.40%	5.40%
Risk-free interest rate, maximum	4.80%	5.50%	4.80%	5.50%
Outstanding stock options
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected volatility range, minimum	75.00%	78.00%	75.00%	78.00%
Expected volatility range, maximum	75.00%	79.00%	75.00%	79.00%
Expected weighted-average volatility	75.00%	79.00%	75.00%	79.00%
Risk-free interest rate, minimum	3.50%	4.40%	3.50%	3.60%
Risk-free interest rate, maximum	3.50%	4.40%	3.50%	4.40%
Minimum \| A And R ESPP
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected term (years)	6 months	6 months	6 months	6 months
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Minimum \| Outstanding stock options
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected term (years)	6 years	5 years 9 months 18 days	6 years	5 years 9 months 18 days
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Maximum \| A And R ESPP
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected term (years)	1 year	1 year	1 year	1 year
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Maximum \| Outstanding stock options
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected term (years)	6 years	6 years	6 years	6 years
Expected dividend yield	0.00%	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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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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