SHAREHOLDERS' EQUITY - Actual regulatory capital position and minimum capital requirements (Details) $ in Thousands	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Total Capital (to risk-weighted assets)
Actual - Amount	$ 117,738	$ 114,421
Actual - Ratio	.1297	.1284
Minimum Capital Required For Capital Adequacy - Amount	$ 72,604	$ 71,278
Minimum Capital Required For Capital Adequacy - Ratio	.08	.080
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 95,292	$ 93,553
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	10.50%	10.50%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount	$ 90,755	$ 89,098
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio	.100	.100
Tier 1 Capital (to risk-weighted assets)
Actual - Amount	$ 107,012	$ 105,430
Actual - Ratio	.1179	.1183
Minimum Capital Required For Capital Adequacy - Amount	$ 54,453	$ 53,459
Minimum Capital Required For Capital Adequacy - Ratio	.060	.060
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 77,141	$ 75,733
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	8.50%	8.50%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount	$ 72,604	$ 71,278
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio	0.080	0.080
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual - Amount	$ 107,012	$ 105,430
Actual - Ratio	.1179	.1183
Minimum Capital Required For Capital Adequacy - Amount	$ 40,840	$ 40,094
Minimum Capital Required For Capital Adequacy - Ratio	4.50%	4.50%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 63,528	$ 62,368
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	7.00%	7.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount	$ 58,991	$ 57,914
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio	6.50%	6.50%
Tier 1 Capital (to average assets)
Actual - Amount	$ 107,012	$ 105,430
Actual - Ratio	0.965	.0960
Minimum Capital Required For Capital Adequacy - Amount	$ 44,376	$ 43,944
Minimum Capital Required For Capital Adequacy - Ratio	0.040	0.040
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 44,376	$ 43,944
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	4.00%	4.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount	$ 55,470	$ 54,930
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio	0.050	0.050