Fair Value Measurements - Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis or Non-Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Held-to-maturity securities	$ 72,841	$ 70,590
Carrying Amount
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	119,630	119,036
Held-to-maturity securities	77,233	76,979
Federal Home Loan Bank stock	9,850	9,892
Loans, net	1,114,943	1,039,789
Loans held for sale	703
Accrued interest receivable	4,164	3,766
Deposits, other than certificates of deposit	362,783	369,711
Certificates of deposit	581,542	498,503
Federal Home Loan Bank advances	234,000	234,000
Accrued interest payable	2,351	2,191
Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	119,630	119,036
Held-to-maturity securities	72,841	70,590
Federal Home Loan Bank stock	9,850	9,892
Loans, net	1,039,071	952,867
Loans held for sale	703
Accrued interest receivable	4,164	3,766
Deposits, other than certificates of deposit	362,783	369,711
Certificates of deposit	583,113	495,551
Federal Home Loan Bank advances	237,619	233,878
Accrued interest payable	2,351	2,191
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	119,630	119,036
Held-to-maturity securities	0	0
Federal Home Loan Bank stock	0	0
Loans, net	0	0
Loans held for sale	0
Accrued interest receivable	4,164	3,766
Deposits, other than certificates of deposit	0	0
Certificates of deposit	0	0
Federal Home Loan Bank advances	0	0
Accrued interest payable	2,351	2,191
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Held-to-maturity securities	72,841	70,590
Federal Home Loan Bank stock	9,850	9,892
Loans, net	0	0
Loans held for sale	703
Accrued interest receivable	0	0
Deposits, other than certificates of deposit	362,783	369,711
Certificates of deposit	583,113	495,551
Federal Home Loan Bank advances	237,619	233,878
Accrued interest payable	0	0
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Held-to-maturity securities	0	0
Federal Home Loan Bank stock	0	0
Loans, net	1,039,071	952,867
Loans held for sale	0
Accrued interest receivable	0	0
Deposits, other than certificates of deposit	0	0
Certificates of deposit	0	0
Federal Home Loan Bank advances	0	0
Accrued interest payable	$ 0	$ 0