COMMITMENTS AND CONTINGENCIES - Summary of outstanding firm commitments (Detail) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Fixed Rate
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	$ 28,141,500	$ 3,156,250
Fixed Rate | Residential Mortgage Loans
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	27,116,500	2,986,250
Fixed Rate | Commercial Real Estate
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	350,000
Fixed Rate | Construction
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	675,000
Fixed Rate | Home Equity Loans
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments		170,000
Variable Rate
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	29,302,739	9,982,375
Variable Rate | Residential Mortgage Loans
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	25,144,739
Variable Rate | Commercial Real Estate
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	3,040,000	1,400,000
Variable Rate | Commercial and Industrial
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	500,000
Variable Rate | Construction
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments		7,522,375
Variable Rate | Home Equity Loans
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	$ 618,000	$ 1,060,000