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Stockholders' Equity - Stock-based Compensation Expense and Valuation Information - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Class Of Stock [Line Items]        
Total unrecognized compensation cost related to unvested stock option grants $ 0.7   $ 0.7  
Expected term 0 years [1] 6 years 6 years 6 years
Stock options [Member]        
Class Of Stock [Line Items]        
Total unrecognized compensation cost related, weighted average period     2 years 6 months 10 days  
Restricted stock units (RSUs) [Member]        
Class Of Stock [Line Items]        
Total unrecognized compensation cost related, weighted average period     1 year 2 months 12 days  
Restricted stock units (RSUs) [Member] | Maximum [Member]        
Class Of Stock [Line Items]        
Unrecognized stock-based compensation expense $ 0.1   $ 0.1  
[1] There were no stock options granted during the three months ended September 30, 2023.