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Stockholders' Equity - Common Stock - Additional Information (Detail) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2022 | Jan. 29, 2021 | Jan. 19, 2021
Class Of Stock [Line Items] |  |  |
Securities authorized for offer and sale, amount |  |  | $ 150,000,000.0
2021 Inducement Equity Plan [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Common shares authorized to be issued | 750,000 |  |
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 | 100,000,000.0 |  |
IPO [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Securities authorized for offer and sale, amount | 100,000,000.0 |  |
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 |  | $ 50,000,000.0 |

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