21. FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
U. S. Government sponsored enterprises	$ 1,989	$ 7,886
Mortgage-backed obligations of federal agencies	319	403
Other debt securities	2,058	0
Total securities available for sale	4,366	8,289
Derivatives	72	44
Fair Value Inputs Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
U. S. Government sponsored enterprises	0	0
Mortgage-backed obligations of federal agencies	0	0
Other debt securities	0	0
Total securities available for sale	0	0
Derivatives	0	0
Fair Value Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
U. S. Government sponsored enterprises	1,989	7,886
Mortgage-backed obligations of federal agencies	319	403
Other debt securities	2,058	0
Total securities available for sale	4,366	8,289
Derivatives	72	44
Fair Value Inputs Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
U. S. Government sponsored enterprises	0	0
Mortgage-backed obligations of federal agencies	0	0
Other debt securities	0	0
Total securities available for sale	0	0
Derivatives	$ 0	$ 0