Fair Values of Financial Instruments-Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage-servicing rights	$ 2,011,889	$ 1,646,509
Significant Unobservable Inputs (Level 3)
Fair Value, Option, Quantitative Disclosures [Line Items]
Collateral-dependent impaired loans	314,000	4,587,000
Mortgage-servicing rights	$ 2,012,000	$ 1,647,000
Significant Unobservable Inputs (Level 3) | Discount rate | Discounted cash flow
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing rights, measurement input	0.10	0.10
Minimum | Significant Unobservable Inputs (Level 3) | Marketability discount | Appraisal
Fair Value, Option, Quantitative Disclosures [Line Items]
Collateral-dependent impaired loans, measurement input	0	0
Maximum | Significant Unobservable Inputs (Level 3) | Marketability discount | Appraisal
Fair Value, Option, Quantitative Disclosures [Line Items]
Collateral-dependent impaired loans, measurement input	0.42	0.39