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Stockholders' Equity - Common Stock - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 12, 2022 | Sep. 30, 2023 | Mar. 31, 2023 | Jul. 25, 2022 | Mar. 31, 2021 | Jan. 29, 2021 | Jan. 19, 2021
Class Of Stock [Line Items] |  |  |  |  |  |  |
Securities authorized for offer and sale, amount |  |  |  |  |  |  | $ 150,000,000
Number of shares subject to outstanding |  | 850,114 | 1,451,217 |  |  |  |
2021 Inducement Equity Plan [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common shares authorized to be issued |  |  |  |  | 750,000 |  |
Equity Incentive Plan 2022 [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common shares authorized to be issued | 1,363,000 | 1,672,574 |  | 750,000 |  |  |
Number of shares subject to outstanding |  | 174,264 |  |  |  |  |
Excercise price per share | $ 2.75 |  |  |  |  |  |
Equity Incentive Plan 2022 [Member] | Common Stock [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common shares authorized to be issued | 50,000 |  |  |  |  |  |
Equity Incentive Plan 2012 [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common shares authorized to be issued | 1,236,738 |  |  |  |  |  |
Common stock shares issued | 126,262 |  |  |  |  |  |
2022 Inducement Equity Plan [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common shares authorized to be issued | 1,000 | 1,000 |  |  |  |  |
Maximum [Member] | Equity Incentive Plan 2022 [Member] | Common Stock [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common shares authorized to be issued | 51,000 |  |  |  |  |  |
2018 Sales Agreement [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Equity sales agreement expiration date |  | Feb. 22, 2021 |  |  |  |  |
ATM Prospectus Supplement [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Issuance of common stock from stock options exercises, net, Shares |  | 1,580,862 |  |  |  |  |
Value of shares sold under equity distribution agreement |  | $ 21,700,000 |  |  |  |  |
2021 Shelf [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common stock value reserved for future issuance |  | 100,000,000 |  |  |  |  |
IPO [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Securities authorized for offer and sale, amount |  | 100,000,000 |  |  |  |  |
At-The-Market Facility [Member] | ATM Prospectus Supplement [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common stock value reserved for future issuance |  | $ 28,300,000 |  |  |  |  |
Issuance of common stock from stock options exercises, net, Shares |  | 0 |  |  |  |  |
At-The-Market Facility [Member] | ATM Prospectus Supplement [Member] | Maximum [Member] |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Common stock value reserved for future issuance |  |  |  |  |  | $ 50,000,000 |

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