LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Allowance for loan losses by portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 8,242	$ 7,645	$ 7,875	$ 7,451	$ 7,451
Provision for (recovery of) credit losses	2,124	(78)	2,491	116
Charge-offs	(24)		(24)
Recoveries	12	8	12	8
Ending balance	10,354	7,575	10,354	7,575	7,875
Individually evaluated	1,179		1,179		833
Collectively evaluated	9,175		9,175		7,042
Loans individually evaluated	11,454		11,454		12,270
Loans collectively evaluated	1,412,706		1,412,706		984,289
Total Recorded Investment	1,424,160		1,424,160		996,559
Provision for loan losses			2,500	100
Cash, Securities and Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,092	877	1,058	764	764
Provision for (recovery of) credit losses	1,345	164	1,379	277
Charge-offs	(24)		(24)
Recoveries	12	8	12	8
Ending balance	2,425	1,049	2,425	1,049	1,058
Collectively evaluated	2,425		2,425		1,058
Loans individually evaluated	1,493		1,493		2,803
Loans collectively evaluated	369,618		369,618		143,898
Total Recorded Investment	371,111		371,111		146,701
Construction and Development
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	186	266	200	232	232
Provision for (recovery of) credit losses	298	24	284	58
Ending balance	484	290	484	290	200
Collectively evaluated	484		484		200
Loans collectively evaluated	74,793		74,793		28,120
Total Recorded Investment	74,793		74,793		28,120
1-4 Family Residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	3,008	2,588	2,850	2,552	2,552
Provision for (recovery of) credit losses	(300)	62	(142)	98
Ending balance	2,708	2,650	2,708	2,650	2,850
Collectively evaluated	2,708		2,708		2,850
Loans collectively evaluated	418,409		418,409		400,134
Total Recorded Investment	418,409		418,409		400,134
Non-Owner Occupied CRE
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,403	1,235	1,176	1,264	1,264
Provision for (recovery of) credit losses	80	(149)	307	(178)
Ending balance	1,483	1,086	1,483	1,086	1,176
Collectively evaluated	1,483		1,483		1,176
Loans collectively evaluated	229,150		229,150		165,179
Total Recorded Investment	229,150		229,150		165,179
Owner Occupied CRE
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	884	780	911	789	789
Provision for (recovery of) credit losses	(124)	20	(151)	11
Ending balance	760	800	760	800	911
Collectively evaluated	760		760		911
Loans collectively evaluated	117,426		117,426		127,968
Total Recorded Investment	117,426		117,426		127,968
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,669	1,899	1,680	1,850	1,850
Provision for (recovery of) credit losses	825	(199)	814	(150)
Ending balance	2,494	$ 1,700	2,494	$ 1,700	1,680
Individually evaluated	1,179		1,179		833
Collectively evaluated	1,315		1,315		847
Loans individually evaluated	9,961		9,961		9,467
Loans collectively evaluated	203,310		203,310		118,990
Total Recorded Investment	$ 213,271		$ 213,271		$ 128,457