Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)		12 Months Ended
	Oct. 19, 2023	Mar. 31, 2024	Apr. 01, 2023	Mar. 31, 2023	Mar. 31, 2022
Summary of Significant Accounting Policies [Line Items]
Allowance for credit losses		$ 5,860,000		$ 5,412,000	$ 4,928,000
Retained earnings		47,130,000		43,773,000
Accrued interest receivable		2,249,000		1,727,000
Held to maturity, allowance for credit loss		0
Trading debt securities		0		0
Common stock issuance		39,364,000
Assets		463,278,000		437,792,000
Liabilities		$ 385,001,000		$ 399,126,000
Stock Offering
Summary of Significant Accounting Policies [Line Items]
Stock Issued During Period, Shares, New Issues	4,130,815
Shares issued, price per share	$ 10
Common stock issuance	$ 41,300,000
Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful lives		3 years
Consumer portfolio adjusted amortized period		3 years
Consumer portfolio amortized terms		3 years
Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful lives		15 years
Consumer portfolio adjusted amortized period		5 years
Consumer portfolio amortized terms		5 years
Cumulative Effect of Adoption, Adjustment
Summary of Significant Accounting Policies [Line Items]
Retained earnings			$ 402,000
ASU 2016-13
Summary of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted		true
Change in accounting principle, accounting standards update, adoption date		Apr. 01, 2023
Increase in allowance for credit losses on loans		$ 299,000
ASU 2016-13 | Unfunded Loan Commitment
Summary of Significant Accounting Policies [Line Items]
Allowance for credit losses		$ 210,000
ASU 2022-02
Summary of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted		true
Change in accounting principle, accounting standards update, adoption date		Apr. 01, 2023