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 ($)	Dec. 31, 2021	Dec. 31, 2020
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	$ 1,527,750	$ 2,832,144
Loans Collectively Evaluated for Impairment	269,859,393	264,710,951
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	4,183,599	4,085,719
Consumer loans [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment		0
Loans Collectively Evaluated for Impairment	1,373,761	5,372,529
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	1,798	1,360
Commercial and industrial loans [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment		0
Loans Collectively Evaluated for Impairment	15,900,097	29,599,982
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	109,724	101,497
Unallocated [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment		0
Loans Collectively Evaluated for Impairment		0
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	32,014	174,383
Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	1,527,750	2,832,144
Loans Collectively Evaluated for Impairment	252,585,535	229,738,440
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	4,040,063	3,808,479
Real Estate [Member] \| Residential [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	1,517,822	1,480,633
Loans Collectively Evaluated for Impairment	96,915,302	104,356,691
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	1,468,649	1,444,921
Real Estate [Member] \| Home equity [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	0	675
Loans Collectively Evaluated for Impairment	11,510,661	8,891,742
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	174,579	133,985
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	19,937,187	15,140,468
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	288,455	311,409
Real Estate [Member] \| Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	0	1,339,199
Loans Collectively Evaluated for Impairment	89,830,611	71,378,670
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	1,757,794	1,531,037
Real Estate [Member] \| Construction and development [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans Individually Evaluated for Impairment	9,928	11,637
Loans Collectively Evaluated for Impairment	34,391,774	29,970,869
Allowance For Loan Losses Individually Evaluated for Impairment	0	0
Allowance For Loan Losses Collectively Evaluated for Impairment	$ 350,586	$ 387,127

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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