LOANS - Summary of loans receivable by credit quality risk (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Total	$ 721,603,936	$ 572,362,843
Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total	1,684,189	7,905,524
Pass
Financing Receivable, Past Due [Line Items]
Total	720,555,735	570,043,048
Pass | Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total	1,684,189	7,905,524
Special Mention
Financing Receivable, Past Due [Line Items]
Total	575,087	383,034
Substandard
Financing Receivable, Past Due [Line Items]
Total	473,114	1,936,761
Residential First Mortgage | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	466,100,627	319,968,234
Residential First Mortgage | Pass | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	465,089,495	318,868,440
Residential First Mortgage | Special Mention | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	555,965	383,034
Residential First Mortgage | Substandard | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	455,167	716,760
Commercial and Multi-Family | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	162,338,669	175,375,419
Commercial and Multi-Family | Pass | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	162,338,669	174,173,925
Commercial and Multi-Family | Substandard | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total		1,201,494
Construction | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	61,825,478	41,384,687
Construction | Pass | Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total	61,825,478	41,384,687
Home Equity and Other Consumer | Consumer
Financing Receivable, Past Due [Line Items]
Total	29,654,973	27,728,979
Home Equity and Other Consumer | Pass
Financing Receivable, Past Due [Line Items]
Total	29,617,904	27,710,472
Home Equity and Other Consumer | Special Mention
Financing Receivable, Past Due [Line Items]
Total	19,122
Home Equity and Other Consumer | Substandard
Financing Receivable, Past Due [Line Items]
Total	$ 17,947	$ 18,507