FAIR VALUE - Assets and Liabilities at Fair Value (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Assets:
Total assets	$ 899,223	$ 919,678
Quoted prices in active markets for identical assets Level 1
Assets:
Total assets	0	0
Significant other observable inputs Level 2
Assets:
Total assets	0	0
Unobservable inputs Level 3
Assets:
Total assets	899,223	919,678
Mortgage servicing rights
Assets:
Total assets	899,223	919,678
Mortgage servicing rights | Quoted prices in active markets for identical assets Level 1
Assets:
Total assets	0	0
Mortgage servicing rights | Significant other observable inputs Level 2
Assets:
Total assets	0	0
Mortgage servicing rights | Unobservable inputs Level 3
Assets:
Total assets	$ 899,223	$ 919,678