Note 11 - Capital Ratios and Regulatory Minimum Requirements (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
The Company [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital	$ 164,271	$ 162,725
Tier 1 capital	155,980	152,077
Common equity tier 1 capital	155,980	152,077
Tier 1 leverage capital	$ 155,980	$ 152,077
Capital to risk-weighted assets	0.1353	0.1319
Tier 1 capital to risk-weighted assets	0.1285	0.1233
Common equity tier 1 capital to risk-weighted assets	12.85%	12.33%
Tier 1 leverage capital to average assets	0.0907	0.0875
Capital required for capital adequacy	$ 97,099	$ 98,701
Tier 1 capital required for capital adequacy	72,825	74,025
Common equity tier 1 capital required for capital adequacy	54,618	55,519
Tier 1 leverage capital required for capital adequacy	$ 68,766	$ 69,507
Capital required for capital adequacy to risk-weighted assets	0.0800	0.0800
Tier 1 capital required for capital adequacy to risk-weighted assets	0.0600	0.0600
Common equity tier 1 capital required for capital adequacy to risk-weighted assets	4.50%	4.50%
Tier 1 leverage capital required for capital adequacy to average assets	0.0400	0.0400
Capital required to be well capitalized	$ 121,374	$ 123,376
Tier 1 capital required to be well capitalized	$ 72,825	$ 74,025
Capital required to be well capitalized to risk-weighted assets	0.1000	0.1000
Tier 1 capital required to be well capitalized to risk-weighted assets	0.0600	0.0600
Bank [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital	$ 151,466	$ 149,908
Tier 1 capital	143,175	139,260
Common equity tier 1 capital	143,175	139,260
Tier 1 leverage capital	$ 143,175	$ 139,260
Capital to risk-weighted assets	0.1286	0.1252
Tier 1 capital to risk-weighted assets	0.1216	0.1163
Common equity tier 1 capital to risk-weighted assets	12.16%	11.63%
Tier 1 leverage capital to average assets	0.0839	0.0807
Capital required for capital adequacy	$ 94,219	$ 95,796
Tier 1 capital required for capital adequacy	70,664	71,847
Common equity tier 1 capital required for capital adequacy	52,998	53,886
Tier 1 leverage capital required for capital adequacy	$ 68,249	$ 69,009
Capital required for capital adequacy to risk-weighted assets	0.0800	0.0800
Tier 1 capital required for capital adequacy to risk-weighted assets	0.0600	0.0600
Common equity tier 1 capital required for capital adequacy to risk-weighted assets	4.50%	4.50%
Tier 1 leverage capital required for capital adequacy to average assets	0.0400	0.0400
Capital required to be well capitalized	$ 117,774	$ 119,746
Tier 1 capital required to be well capitalized	94,219	95,896
Common equity tier 1 capital required to be well capitalized	76,553	77,835
Tier 1 leverage capital required to be well capitalized	$ 85,311	$ 86,261
Capital required to be well capitalized to risk-weighted assets	0.1000	0.1000
Tier 1 capital required to be well capitalized to risk-weighted assets	0.0800	0.0800
Common equity tier 1 capital required to be well capitalized to risk-weighted assets	6.50%	6.50%
Tier 1 leverage capital required to be well capitalized to average assets	0.0500	0.0500