Summary of loans receivable on nonaccrual status (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	$ 5,549	$ 3,534
With No Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	5,309	3,266
With An Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	240	268
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	5,419	3,506
Real Estate [Member] | With No Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	5,277	3,238
Real Estate [Member] | With An Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	142	268
Commercial Borrower [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	98
Commercial Borrower [Member] | With An Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	98
Commercial Borrower [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	2,238	812
Commercial Borrower [Member] | Real Estate [Member] | With No Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	2,096	544
Commercial Borrower [Member] | Real Estate [Member] | With An Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	142	268
Residential Real Estate [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	3,002	2,495
Residential Real Estate [Member] | Real Estate [Member] | With No Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	3,002	2,495
Multifamily [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	179	199
Multifamily [Member] | Real Estate [Member] | With No Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	179	199
Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	32	28
Consumer Loan [Member] | With No Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable on nonaccrual status	$ 32	$ 28