Note 12 - Regulatory and Operational Matters - Regulatory Capital Amounts and Ratios (Details) $ in Thousands		Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jan. 01, 2019
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio		0.1
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio				0.105
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio		0.08
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio				0.085
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio		0.065		0.07
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio		0.09
Parent Company [Member]
Total Capital (to Risk Weighted Assets) Actual Amount		$ 89,597	$ 90,083
Total Capital (to Risk Weighted Assets) Actual Ratio		0.10405	0.1051
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	[1]
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	[1]
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount	[2]
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio	[2]
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount		$ 68,887	$ 68,573
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio		0.08	0.08
Tier 1 Capital (to Risk Weighted Assets) Actual Amount		$ 68,832	$ 69,957
Tier 1 Capital (to Risk Weighted Assets) Actual Ratio		0.07994	0.08161
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	[1]
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	[1]
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount	[2]
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio	[2]
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount		$ 51,665	$ 51,430
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio		0.06	0.06
Common Equity Tier 1 Capital (to Risk Weighted Assets) Actual Amount		$ 60,832	$ 61,957
Common Equity Tier 1 Capital (to Risk Weighted Assets) Actual Ratio		0.07065	0.07228
Common Equity Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	[1]
Common Equity Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	[1]
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount	[2]
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio	[2]
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount		$ 38,749	$ 38,572
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio		0.045	0.045
Tier 1 Capital (to Average Assets) Actual Amount		$ 68,832	$ 69,957
Tier 1 Capital (to Average Assets) Actual Ratio		0.07001	0.07148
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	[1]
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	[1]
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes Amount		$ 39,328	$ 39,148
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes Ratio		0.04	0.04
Subsidiaries [Member]
Total Capital (to Risk Weighted Assets) Actual Amount		$ 100,779	$ 100,953
Total Capital (to Risk Weighted Assets) Actual Ratio		0.11758	0.11826
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	[1]	$ 85,713	$ 85,362
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	[1]	0.1	0.1
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount	[2]	$ 89,999	$ 89,630
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio	[2]	0.105	0.105
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount		$ 68,570	$ 68,290
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio		0.08	0.08
Tier 1 Capital (to Risk Weighted Assets) Actual Amount		$ 90,062	$ 90,827
Tier 1 Capital (to Risk Weighted Assets) Actual Ratio		0.10507	0.1064
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	[1]	$ 68,570	$ 68,290
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	[1]	0.08	0.08
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount	[2]	$ 72,856	$ 72,558
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio	[2]	0.085	0.085
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount		$ 51,428	$ 51,217
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio		0.06	0.06
Common Equity Tier 1 Capital (to Risk Weighted Assets) Actual Amount		$ 90,062	$ 90,827
Common Equity Tier 1 Capital (to Risk Weighted Assets) Actual Ratio		0.10507	0.1064
Common Equity Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	[1]	$ 55,713	$ 55,485
Common Equity Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	[1]	0.065	0.065
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount	[2]	$ 59,999	$ 59,753
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio	[2]	0.07	0.07
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount		$ 38,571	$ 38,413
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio		0.045	0.045
Tier 1 Capital (to Average Assets) Actual Amount		$ 90,062	$ 90,827
Tier 1 Capital (to Average Assets) Actual Ratio		0.09158	0.09279
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	[1]	$ 49,169	$ 48,944
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	[1]	0.05	0.05
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes Amount		$ 39,335	$ 39,155
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes Ratio		0.04	0.04

[1] Designation as "Well Capitalized" does not apply to bank holding companies - the Company. Such categorization of capital adequacy only applies to insured depository institutions - the Bank.

[2] The Capital Conservation Buffer implemented by the FDIC began to be phased in beginning January 1, 2016. It was not applicable to periods prior to that date and does not apply to bank holding companies - the Company.