Equity Incentive Plans and Stock-Based Compensation - Summary of the Activity Under the Stock Plan (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
Sep. 30, 2023 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) $ / shares
Share-Based Payment Arrangement [Abstract]
Balance as of March 31, 2023 \| shares	68,050,752
Granted \| shares	13,097,016
Exercised \| shares	(1,009,279)
Cancelled/forfeited/expired \| shares	(4,500,546)
Balance as of September 30, 2023 \| shares	75,637,943
Vested and exercisable as of September 30, 2023 \| shares	49,157,358
Weighted-Average Exercise Price Beginning balance As Of March 31,2023 \| $ / shares	$ 4.2
Weighted-Average Exercise Price, Granted \| $ / shares	1.25
Weighted-Average Exercise Price, Exercised \| $ / shares	0.47
Weighted-Average Exercise Price, Cancelled/Forfeited/Expired \| $ / shares	4.85
Weighted-Average Exercise Price, Ending balance As Of September 30, 2023 \| $ / shares	3.7	$ 4.2
Weighted-Average Exercise Price, Vested and exercisable September 30, 2023 \| $ / shares	$ 4.23
Weighted-Average Remaining Contractual Term (Years)	6 years	6 years
Weighted-Average Remaining Contractual Term (Years), Vested and Exercisable	4 years 7 months 6 days
Aggregate Intrinsic Value of Options Outstanding \| $	$ 2,086	$ 10,621
Aggregate Intrinsic Value of Options Outstanding, Vested and Exercisable \| $	$ 1,661

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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