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Stockholders' Equity - Stock Options and Employee Stock Purchase Plan - Additional Information (Detail) - USD ($) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 22, 2022 | Oct. 07, 2021 | Mar. 08, 2021 | Mar. 31, 2023 | Mar. 31, 2022
Class Of Stock [Line Items] |  |  |  |  |
Revenue recognized | $ 1,500,000 |  |  | $ 370,000 | $ 1,500,000
Vesting criteria probability of achievement percentage |  |  |  | 0.00% |
Expense recorded |  |  |  | $ 0 |
Weighted-average remaining contractual term of stock options exercisable |  |  |  | 8 years |
Weighted-average remaining contractual term of stock options outstanding |  |  |  | 8 years |
Issuance of common stock from stock options exercises, net, Shares |  |  |  | 0 | 0
Number of common stock shares approved under ESPP |  |  |  | 2,709,831 |
Expected life of options |  |  |  | 6 years | 5 years 9 months
Number of stock options vested |  |  |  | 0 |
Aforementioned Officer One [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Stock options granted |  | 120,000 |  |  |
Aforementioned Officer Two [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Stock options granted |  | 25,000 |  |  |
Equity Incentive Plan 2022 [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Stock options granted |  |  |  | 255,474 |
Number of common stock shares approved under ESPP |  |  |  | 1,071,471 |
2012 Plan [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Stock options granted |  |  |  | 255,474 |
2012 Plan [Member] | Executive Chairman [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Stock options granted |  | 60,000 | 120,000 |  |
2012 Plan [Member] | Chief Scientific Officer [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Stock options granted |  | 15,000 | 25,000 |  |
2016 Employee Stock Purchase Plan [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Number of common stock shares approved under ESPP |  |  |  | 75,000 |
Employee subscription rate |  |  |  | 15.00% |
Compensation amount per employee |  |  |  | $ 25,000 |
Fair market value at discount |  |  |  | 85.00% |
Purchase period |  |  |  | 6 months |
Initial offering period |  |  |  | 2016-09 |
Description of plan |  |  |  | Shares under the ESPP are purchased at 85 percent of the fair market value at the lower of (i) the closing price on the first trading day of the six-month purchase period or (ii) the closing price on the last trading day of the six-month purchase period. |
Shares issued under ESPP |  |  |  | 1,009 |
Shares remaining available for purchase under ESPP |  |  |  | 58,426 |

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