SECURITIES - Amortized cost, fair value and tax equivalent yield of securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
U.S. Government agency notes - After 5 years but within 10 years
Amortized cost	$ 4,991
Fair value	$ 5,049
Yield	3.59%
U.S. Government agency notes - Total
Amortized cost	$ 4,991
Fair value	$ 5,049
Yield	3.59%
Municipal bonds - Within 1 year
Amortized cost	$ 296
Fair value	$ 296
Yield	1.97%
Municipal bonds - After 1 year but within 5 years
Amortized cost	$ 137
Fair value	$ 137
Yield	2.78%
Municipal bonds - After 10 years but within 15 years
Amortized cost	$ 4,368
Fair value	$ 4,410
Yield	4.79%
Municipal bonds - After 15 years
Amortized cost	$ 533
Fair value	$ 536
Yield	3.35%
Municipal bonds - Total
Amortized cost	$ 5,334
Fair value	$ 5,379
Yield	4.44%
Mortgage-backed securities - U.S. Government agency and U.S. Government-sponsored enterprises
Amortized cost	$ 32,522
Fair value	$ 32,327
Yield	3.01%
Collateralized mortgage obligations - U.S. Government agency and U.S. Government-sponsored enterprises
Amortized cost	$ 17,835
Fair value	$ 17,747
Yield	3.00%
SBA bonds
Amortized cost	$ 27,914
Fair value	$ 27,740
Yield	3.12%
Corporate bonds - After 5 years but within 10 years
Amortized cost	$ 3,500
Fair value	$ 3,576
Yield	5.57%
Fair value
Amortized cost	$ 92,096
Fair value	$ 91,818
Yield	3.25%