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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, 2024	Sep. 30, 2023		Sep. 30, 2024	Sep. 30, 2023
Class Of Stock [Line Items]
Total unrecognized compensation cost related to unvested stock option grants	$ 0.8			$ 0.8
Stock options granted		0
Expected term	6 years	0 years	[1]	6 years	6 years
Employee Stock Option
Class Of Stock [Line Items]
Total unrecognized compensation cost related, weighted average period				2 years 8 months 26 days
Restricted stock units (RSUs) [Member]
Class Of Stock [Line Items]
Total unrecognized compensation cost related, weighted average period				7 months 6 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.

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