Fair Value Measurements -Schedule of Fair Value Hierarchy for Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
FINANCIAL ASSETS:
Available-for-sale securities	$ 8,032		$ 8,287
Held-to-maturity securities	1,779		1,787
Mortgage servicing rights	4,665	$ 4,540	4,632	$ 4,681	$ 4,726	$ 4,687
Level 1
FINANCIAL ASSETS:
Cash and cash equivalents	148,930		49,690
Available-for-sale securities	0		0
Held-to-maturity securities	0		0
Loans held-for-sale	0		0
Loans held-for-portfolio, net	0		0
Mortgage servicing rights	0		0
FINANCIAL LIABILITIES:
Time deposits	0		0
Borrowings	0		0
Subordinated notes	0		0
Level 2
FINANCIAL ASSETS:
Cash and cash equivalents	0		0
Available-for-sale securities	8,032		8,287
Held-to-maturity securities	1,779		1,787
Loans held-for-sale	65		603
Loans held-for-portfolio, net	0		0
Mortgage servicing rights	0		0
FINANCIAL LIABILITIES:
Time deposits	305,462		308,604
Borrowings	40,000		40,000
Subordinated notes	11,959		9,996
Level 3
FINANCIAL ASSETS:
Cash and cash equivalents	0		0
Available-for-sale securities	0		0
Held-to-maturity securities	0		0
Loans held-for-sale	0		0
Loans held-for-portfolio, net	861,275		837,579
Mortgage servicing rights	4,665		4,632
FINANCIAL LIABILITIES:
Time deposits	0		0
Borrowings	0		0
Subordinated notes	0		0
Carrying Value
FINANCIAL ASSETS:
Cash and cash equivalents	148,930		49,690
Available-for-sale securities	8,032		8,287
Held-to-maturity securities	2,139		2,166
Loans held-for-sale	65		603
Loans held-for-portfolio, net	893,148		885,718
Mortgage servicing rights	4,665		4,632
FINANCIAL LIABILITIES:
Time deposits	304,630		307,962
Borrowings	40,000		40,000
Subordinated notes	11,749		11,717
Estimated Fair Value
FINANCIAL ASSETS:
Cash and cash equivalents	148,930		49,690
Available-for-sale securities	8,032		8,287
Held-to-maturity securities	1,779		1,787
Loans held-for-sale	65		603
Loans held-for-portfolio, net	861,275		837,579
Mortgage servicing rights	4,665		4,632
FINANCIAL LIABILITIES:
Time deposits	305,462		308,604
Borrowings	40,000		40,000
Subordinated notes	$ 11,959		$ 9,996