COMMITMENTS AND CONTINGENCIES - Summary of outstanding firm commitments (Detail) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Fixed Rate
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	$ 34,972,575	$ 3,156,250
Fixed Rate | Residential Mortgage Loans
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	33,857,575	2,986,250
Fixed Rate | Commercial Real Estate
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	250,000
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	190,000	170,000
Variable Rate
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	2,924,500	9,982,375
Variable Rate | Residential Mortgage Loans
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments	2,094,500
Variable Rate | Commercial Real Estate
Commitments and Contingencies [Line Items]
Fair value, concentration of risk, commitments		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	$ 330,000	$ 1,060,000