Loans and Allowance for Loan Losses - Summary Of Impaired Loans With And Without Allowances For Credit Losses Recorded Investment Unpaid Principal Amount (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans Without Related Allowance Record Investment	$ 1,527,750	$ 2,832,144
Impaired Loans With Related Allowance Principal Balance		0
Impaired Loans Without Related Allowance Principal Balance	1,527,750	2,832,144
Impaired Loans With Related Allowance		0
Impaired Loans Without Related Allowance	0	0
Consumer loans [Member]
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans With Related Allowance Record Investment	0
Impaired Loans Without Related Allowance Record Investment	0	0
Impaired Loans With Related Allowance Principal Balance	0	0
Impaired Loans Without Related Allowance Principal Balance	0	0
Impaired Loans With Related Allowance	0	0
Impaired Loans Without Related Allowance	0	0
Commercial and industrial loans [Member]
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans Without Related Allowance Record Investment	0	0
Impaired Loans With Related Allowance Principal Balance		0
Impaired Loans Without Related Allowance Principal Balance	0	0
Impaired Loans With Related Allowance		0
Impaired Loans Without Related Allowance	0	0
Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans With Related Allowance Record Investment	0	0
Impaired Loans Without Related Allowance Record Investment	1,527,750	2,832,144
Impaired Loans With Related Allowance Principal Balance	0	0
Impaired Loans Without Related Allowance Principal Balance	1,527,750	2,832,144
Impaired Loans With Related Allowance	0	0
Impaired Loans Without Related Allowance	0	0
Real Estate [Member] \| Residential [Member]
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans With Related Allowance Record Investment	0	0
Impaired Loans Without Related Allowance Record Investment	1,517,822	1,480,633
Impaired Loans With Related Allowance Principal Balance	0	0
Impaired Loans Without Related Allowance Principal Balance	1,517,822	1,480,633
Impaired Loans With Related Allowance	0	0
Impaired Loans Without Related Allowance	0	0
Real Estate [Member] \| Home equity [Member]
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans With Related Allowance Record Investment	0	0
Impaired Loans Without Related Allowance Record Investment	0	675
Impaired Loans With Related Allowance Principal Balance	0	0
Impaired Loans Without Related Allowance Principal Balance	0	675
Impaired Loans With Related Allowance	0	0
Impaired Loans Without Related Allowance	0	0
Real Estate [Member] \| Multi-family [Member]
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans With Related Allowance Record Investment	0	0
Impaired Loans Without Related Allowance Record Investment	0	0
Impaired Loans With Related Allowance Principal Balance	0	0
Impaired Loans Without Related Allowance Principal Balance	0	0
Impaired Loans With Related Allowance	0	0
Impaired Loans Without Related Allowance	0	0
Real Estate [Member] \| Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans With Related Allowance Record Investment	0	0
Impaired Loans Without Related Allowance Record Investment	0	1,339,199
Impaired Loans With Related Allowance Principal Balance	0	0
Impaired Loans Without Related Allowance Principal Balance	0	1,339,199
Impaired Loans With Related Allowance	0	0
Impaired Loans Without Related Allowance	0	0
Real Estate [Member] \| Construction and land development [Member]
Loans And Leases Receivable Disclosure [Line Items]
Impaired Loans With Related Allowance Record Investment	0	0
Impaired Loans Without Related Allowance Record Investment	9,928	11,637
Impaired Loans With Related Allowance Principal Balance	0	0
Impaired Loans Without Related Allowance Principal Balance	9,928	11,637
Impaired Loans With Related Allowance	0	0
Impaired Loans Without Related Allowance	$ 0	$ 0

Impaired financing receivable with no related allowance.

No definition available.

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- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

+ Details

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- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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- Definition

Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

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- Definition

Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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