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Fair Value of Financial Instruments - Additional Information (Details) - USD ($)	6 Months Ended
	Sep. 30, 2025	Mar. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities - available for sale	$ 59,670,000	$ 59,369,000
Fair value assets and liabilities transfer amount	0
Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities - available for sale	59,700,000	59,400,000
Assets or liabilities measured at fair value	$ 0	$ 0

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