SECURITIES - Contractual maturity (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 29, 2020 USD ($) security	Sep. 30, 2020 USD ($) security	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) security	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) security
Securities
Pledged as collateral		$ 48,900,000		$ 48,900,000
Fair Value						$ 26,927,000
Amortized Cost-Available-for-Sale
After 1 year through 5 years		5,000,000		5,000,000
After 5 years through 10 years		5,003,000		5,003,000
Total for contractual maturity		10,003,000		10,003,000
Amortized Cost		276,208,000		276,208,000		237,574,000
Fair Value-Available-for-Sale
After 1 year through 5 years		5,012,000		5,012,000
After 5 years through 10 years		5,125,000		5,125,000
Total for contractual maturity		10,137,000		10,137,000
Total		280,308,000		280,308,000		239,473,000
Amortized Cost-Held-to-Maturity
Amortized Cost						26,372,000
Gross Unrealized Gains						$ 561,000
Sales
Proceeds				72,333,000	$ 28,391,000
Gross gains				2,521,000	1,267,000
Calls
Proceeds		$ 2,000,000	$ 11,775,000	8,635,000	20,145,000
Gross gains			$ 77,000	$ 12,000	$ 77,000
Mortgage-backed securities
Securities
Number of securities pledged | security		26		26		7
Pledged as collateral		$ 48,900,000		$ 48,900,000		$ 15,700,000
HTM securities
Securities
Number of securities sold | security	5
Sold HTM securities
Securities
Realized gain	$ 1,300,000
Amortized Cost-Held-to-Maturity
Amortized Cost	4,500,000
Transferred securities
Securities
Transfer amount	21,500,000
Fair Value-Available-for-Sale
Total	22,100,000
Amortized Cost-Held-to-Maturity
Gross Unrealized Gains	$ 522,000
U.S. government agency and government-sponsored residential mortgage-backed securities
Securities
Fair Value						12,762,000
Amortized Cost-Available-for-Sale
No single maturity date		230,072,000		230,072,000
Amortized Cost		230,072,000		230,072,000		163,982,000
Fair Value-Available-for-Sale
No single maturity date		232,627,000		232,627,000
Total		232,627,000		232,627,000		165,173,000
Amortized Cost-Held-to-Maturity
Amortized Cost						12,682,000
Gross Unrealized Gains						86,000
U.S. government-sponsored collateralized mortgage obligations
Securities
Fair Value						1,502,000
Amortized Cost-Available-for-Sale
No single maturity date		19,675,000		19,675,000
Amortized Cost		19,675,000		19,675,000		26,137,000
Fair Value-Available-for-Sale
No single maturity date		20,140,000		20,140,000
Total		20,140,000		20,140,000		26,373,000
Amortized Cost-Held-to-Maturity
Amortized Cost						1,433,000
Gross Unrealized Gains						69,000
SBA asset-backed securities
Securities
Fair Value						5,432,000
Amortized Cost-Available-for-Sale
No single maturity date		16,458,000		16,458,000
Amortized Cost		16,458,000		16,458,000		32,461,000
Fair Value-Available-for-Sale
No single maturity date		17,404,000		17,404,000
Total		17,404,000		$ 17,404,000		32,723,000
Amortized Cost-Held-to-Maturity
Amortized Cost						5,308,000
Gross Unrealized Gains						124,000
SBA asset-backed securities | Minimum
Securities
Maturity period				2 years
SBA asset-backed securities | Maximum
Securities
Maturity period				30 years
Municipal bonds
Securities
Fair Value						7,231,000
Amortized Cost-Held-to-Maturity
Amortized Cost						6,949,000
Gross Unrealized Gains						282,000
U.S. government and government-sponsored enterprise obligations
Amortized Cost-Available-for-Sale
Amortized Cost		10,003,000		$ 10,003,000		14,994,000
Fair Value-Available-for-Sale
Total		$ 10,137,000		$ 10,137,000		$ 15,204,000
U.S. government and government-sponsored enterprise obligations | Minimum
Securities
Maturity period				3 years
Callable period				1 month
U.S. government and government-sponsored enterprise obligations | Maximum
Securities
Maturity period				8 years
Callable period				1 year