Fair Value of Financial Instruments - Carrying Amounts and Estimated FV by FV Hierarchy (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Financial assets:
Debt securities held to maturity, Fair Value	$ 38,162,626	$ 39,804,828
Carrying Amount
Financial assets:
Loans, net	186,354,436	174,315,171
Financial liabilities:
Interest-bearing deposits	222,057,692	220,217,134
Fixed rate, fixed term FHLB advances	19,500,000	6,000,000
Estimated Fair Value
Financial assets:
Loans, net	177,234,000	165,086,000
Financial liabilities:
Interest-bearing deposits	200,557,000	207,001,000
Fixed rate, fixed term FHLB advances	19,459,137	5,990,708
Level 1
Financial assets:
Loans, net	0	0
Financial liabilities:
Interest-bearing deposits	0	0
Fixed rate, fixed term FHLB advances	0	0
Level 2
Financial assets:
Loans, net	0	0
Financial liabilities:
Interest-bearing deposits	200,557,000	207,001,000
Fixed rate, fixed term FHLB advances	19,459,137	5,990,708
Level 3
Financial assets:
Loans, net	177,234,000	165,086,000
Financial liabilities:
Interest-bearing deposits	0	0
Fixed rate, fixed term FHLB advances	0	0
U.S. government sponsored agencies \| Carrying Amount
Financial assets:
Debt securities held to maturity, Fair Value	28,306,633	28,223,324
U.S. government sponsored agencies \| Estimated Fair Value
Financial assets:
Debt securities held to maturity, Fair Value	27,494,019	27,990,273
U.S. government sponsored agencies \| Level 1
Financial assets:
Debt securities held to maturity, Fair Value	0	0
U.S. government sponsored agencies \| Level 2
Financial assets:
Debt securities held to maturity, Fair Value	27,494,019	27,990,273
U.S. government sponsored agencies \| Level 3
Financial assets:
Debt securities held to maturity, Fair Value	0	0
U.S. Treasury securities
Financial assets:
Debt securities held to maturity, Fair Value	10,668,607	11,814,555
U.S. Treasury securities \| Carrying Amount
Financial assets:
Debt securities held to maturity, Fair Value	10,699,998	11,827,534
U.S. Treasury securities \| Estimated Fair Value
Financial assets:
Debt securities held to maturity, Fair Value	10,668,607	11,814,555
U.S. Treasury securities \| Level 1
Financial assets:
Debt securities held to maturity, Fair Value	10,668,607	11,814,555
U.S. Treasury securities \| Level 2
Financial assets:
Debt securities held to maturity, Fair Value	0	0
U.S. Treasury securities \| Level 3
Financial assets:
Debt securities held to maturity, Fair Value	$ 0	$ 0

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

+ References

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- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-Name Accounting Standards Codification
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-Topic 320
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5A
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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-Name Accounting Standards Codification
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-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

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