Equity Incentive Plan - Schedule of Assumptions Utilized to Estimate the Fair Value of Stock Options Granted (Detail)	12 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Summary Of Stock Option Activities [Line Items]
Dividend yield	0.00%	0.00%
Minimum [Member]
Summary Of Stock Option Activities [Line Items]
Risk free interest rate	0.174%	0.304%
Expected volatility	88.02%	71.65%
Expected term	2 years 9 months 18 days	2 years 6 months
Maximum [Member]
Summary Of Stock Option Activities [Line Items]
Risk free interest rate	0.527%	2.38%
Expected volatility	101.67%	78.95%
Expected term	6 years 1 month 6 days	6 years

Summary of stock option activities.

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- Definition

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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- Definition

The estimated measure of the 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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- Definition

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

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- Definition

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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-Name Accounting Standards Codification
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