Loans and Allowance for Loan Losses - Schedule of Aging of the Recorded Investment in Past Due Loans and Nonaccrual Loans (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Impaired [Line Items]
Total	$ 271,387,143	$ 267,543,095
Non-accrual	414,406	1,963,197
Consumer loans [Member]
Financing Receivable Impaired [Line Items]
Total	1,373,761	5,372,529
Non-accrual	0	0
Commercial and industrial loans [Member]
Financing Receivable Impaired [Line Items]
Total	15,900,097	29,599,982
Non-accrual		0
Financial Asset, Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,475,855	1,811,911
Financial Asset, Past Due [Member] | Consumer loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, Past Due [Member] | Commercial and industrial loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	151,136
Financial Asset, Not Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	269,911,288	265,731,184
Financial Asset, Not Past Due [Member] | Consumer loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,373,761	5,372,529
Financial Asset, Not Past Due [Member] | Commercial and industrial loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	15,900,097	29,448,846
30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,330,647	191,719
30 to 59 Days Past Due [Member] | Consumer loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
30 to 59 Days Past Due [Member] | Commercial and industrial loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	151,136
60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	85,097	84,167
60 to 89 Days Past Due [Member] | Consumer loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
60 to 89 Days Past Due [Member] | Commercial and industrial loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
90 Days or Greater Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	60,111	1,536,025
90 Days or Greater Past Due [Member] | Consumer loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
90 Days or Greater Past Due [Member] | Commercial and industrial loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member]
Financing Receivable Impaired [Line Items]
Total	254,113,285	232,570,584
Non-accrual	414,406	1,963,197
Real Estate [Member] | Residential [Member]
Financing Receivable Impaired [Line Items]
Total	98,433,124	105,837,324
Non-accrual	354,295	623,998
Real Estate [Member] | Home equity [Member]
Financing Receivable Impaired [Line Items]
Total	11,510,661	8,892,417
Non-accrual	0	0
Real Estate [Member] | Multi-family [Member]
Financing Receivable Impaired [Line Items]
Total	19,937,187	15,140,468
Non-accrual	0	0
Real Estate [Member] | Commercial [Member]
Financing Receivable Impaired [Line Items]
Total	89,830,611	72,717,869
Non-accrual	0	1,339,199
Real Estate [Member] | Construction and land development [Member]
Financing Receivable Impaired [Line Items]
Total	34,401,702	29,982,506
Non-accrual	60,111	0
Real Estate [Member] | Financial Asset, Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,475,855	1,660,775
Real Estate [Member] | Financial Asset, Past Due [Member] | Residential [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,405,816	321,576
Real Estate [Member] | Financial Asset, Past Due [Member] | Home equity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | Financial Asset, Past Due [Member] | Multi-family [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | Financial Asset, Past Due [Member] | Commercial [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	1,339,199
Real Estate [Member] | Financial Asset, Past Due [Member] | Construction and land development [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	70,039	0
Real Estate [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	252,637,430	230,909,809
Real Estate [Member] | Financial Asset, Not Past Due [Member] | Residential [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	97,027,308	105,515,748
Real Estate [Member] | Financial Asset, Not Past Due [Member] | Home equity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	11,510,661	8,892,417
Real Estate [Member] | Financial Asset, Not Past Due [Member] | Multi-family [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	19,937,187	15,140,468
Real Estate [Member] | Financial Asset, Not Past Due [Member] | Commercial [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	89,830,611	71,378,670
Real Estate [Member] | Financial Asset, Not Past Due [Member] | Construction and land development [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	34,331,663	29,982,506
Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,330,647	40,583
Real Estate [Member] | 30 to 59 Days Past Due [Member] | Residential [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,330,647	40,583
Real Estate [Member] | 30 to 59 Days Past Due [Member] | Home equity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 30 to 59 Days Past Due [Member] | Multi-family [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 30 to 59 Days Past Due [Member] | Commercial [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 30 to 59 Days Past Due [Member] | Construction and land development [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	85,097	84,167
Real Estate [Member] | 60 to 89 Days Past Due [Member] | Residential [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	75,169	84,167
Real Estate [Member] | 60 to 89 Days Past Due [Member] | Home equity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 60 to 89 Days Past Due [Member] | Multi-family [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 60 to 89 Days Past Due [Member] | Commercial [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 60 to 89 Days Past Due [Member] | Construction and land development [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	9,928	0
Real Estate [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	60,111	1,536,025
Real Estate [Member] | 90 Days or Greater Past Due [Member] | Residential [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	196,826
Real Estate [Member] | 90 Days or Greater Past Due [Member] | Home equity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 90 Days or Greater Past Due [Member] | Multi-family [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Real Estate [Member] | 90 Days or Greater Past Due [Member] | Commercial [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	1,339,199
Real Estate [Member] | 90 Days or Greater Past Due [Member] | Construction and land development [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 60,111	$ 0