Loans and Allowance for Loan Losses - Summary Of Allowances For Loan Losses And Recorded Investments In Loans Individually And Collectively Evaluated For Impairment (Detail) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	$ 1,374,599	$ 1,527,750
Loans Collectively Evaluated for Impairment	272,225,413	269,859,393
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	4,211,089	4,183,599
Consumer Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	0	0
Loans Collectively Evaluated for Impairment	1,314,367	1,373,761
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	1,374	1,798
Commercial And Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	0	0
Loans Collectively Evaluated for Impairment	13,490,067	15,900,097
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	124,213	109,724
Unallocated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	0	0
Loans Collectively Evaluated for Impairment	0	0
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	32,017	32,014
Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	1,374,599	1,527,750
Loans Collectively Evaluated for Impairment	257,420,979	252,585,535
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	4,053,485	4,040,063
Real Estate [Member] \| Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	1,365,448	1,517,822
Loans Collectively Evaluated for Impairment	100,669,029	96,915,302
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	1,526,841	1,468,649
Real Estate [Member] \| Home equity [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	0	0
Loans Collectively Evaluated for Impairment	11,467,709	11,510,661
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	173,236	174,579
Real Estate [Member] \| Multi-family [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	0	0
Loans Collectively Evaluated for Impairment	19,950,041	19,937,187
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	280,408	288,455
Real Estate [Member] \| Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	0	0
Loans Collectively Evaluated for Impairment	95,384,937	89,830,611
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	1,805,018	1,757,794
Real Estate [Member] \| Construction and development [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	9,151	9,928
Loans Collectively Evaluated for Impairment	29,949,263	34,391,774
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	$ 267,982	$ 350,586

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

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- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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