SECURITIES - Amortized cost, fair value and tax equivalent yield of securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
U.S. Government agency notes - After 5 years but within 10 years
Amortized cost	$ 2,497
Fair value	$ 2,551
Yield	3.48%
U.S. Government agency notes - Total
Amortized cost	$ 2,497
Fair value	$ 2,551
Yield	3.48%
Municipal bonds - Within 1 year
Amortized cost	$ 60
Fair value	$ 60
Yield	2.63%
Municipal bonds - After 5 years but within 10 years
Amortized cost	$ 1,734
Fair value	$ 1,833
Yield	3.16%
Municipal bonds - After 10 years
Amortized cost	$ 24,768
Fair value	$ 25,300
Yield	3.48%
Municipal bonds - Total
Amortized cost	$ 26,562
Fair value	$ 27,193
Yield	3.46%
Corporate bonds - After 5 years but within 10 years
Amortized cost	$ 5,000
Fair value	$ 5,108
Yield	5.21%
Mortgage-backed securities, CMO securities and SBA securities
Amortized cost	$ 56,025
Fair value	$ 56,949
Yield	2.85%
Securities available-for-sale
Amortized cost	$ 90,084
Fair value	$ 91,801
Yield	3.17%