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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