Note 13 - Regulatory Capital (Details) - Capital Regulatory Ratios - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Total risk based capital
Capital	$ 145,089	$ 142,556
Capital to risk-weighted assets	13.19%	15.10%
Capital required for capital adequacy	$ 87,976	$ 75,543
Capital required for capital adequacy to risk-weighted assets	8.00%	8.00%
Capital required to be well capitalized to risk-weighted assets	10.00%
Tier one risk based capital
Tier one risk-based capital	$ 136,386	$ 131,020
Tier one risk-based capital to risk-weighted assets	12.40%	13.88%
Tier one risk-based capital required for capital adequacy	$ 65,982	$ 37,771
Tier one risk-based capital required for capital adequacy to risk-weighted assets	6.00%	4.00%
Tier one risk-based capital required to be well capitalized to risk-weighted assets	8.00%	6.00%
CET 1 risk based capital
Common equity tier one risk-based capital	$ 114,586
Common equity tier one risk-based capital to risk-weighted assets	10.42%
Common equity tier one risk-based capital required for capital adequacy	$ 49,487
Common equity tier one risk-based capital required for capital adequacy to risk-weighted assets	4.50%
Common equity tier one risk-based capital required to be well capitalized to risk-weighted assets	6.50%
Tier one leveraged capital
Tier one leverage capital	$ 136,386	$ 131,020
Tier one leverage capital to average assets	9.65%	11.23%
Tier one leverage capital required for capital adequacy	$ 56,531	$ 46,680
Tier one leverage capitalrequired for capital adequacy to average assets	4.00%	4.00%
Subsidiaries [Member]
Total risk based capital
Capital	$ 138,566	$ 132,460
Capital to risk-weighted assets	12.65%	14.04%
Capital required for capital adequacy	$ 87,617	$ 75,491
Capital required for capital adequacy to risk-weighted assets	8.00%	8.00%
Capital required to be well capitalized	$ 109,521	$ 94,364
Capital required to be well capitalized to risk-weighted assets	10.00%	10.00%
Tier one risk based capital
Tier one risk-based capital	$ 129,863	$ 120,924
Tier one risk-based capital to risk-weighted assets	11.86%	12.81%
Tier one risk-based capital required for capital adequacy	$ 65,712	$ 37,746
Tier one risk-based capital required for capital adequacy to risk-weighted assets	6.00%	4.00%
Tier one risk-based capital required to be well capitalized	$ 87,617	$ 56,618
Tier one risk-based capital required to be well capitalized to risk-weighted assets	8.00%	6.00%
CET 1 risk based capital
Common equity tier one risk-based capital	$ 129,863
Common equity tier one risk-based capital to risk-weighted assets	11.86%
Common equity tier one risk-based capital required for capital adequacy	$ 49,284
Common equity tier one risk-based capital required for capital adequacy to risk-weighted assets	4.50%
Common equity tier one risk-based capital required to be well capitalized	$ 71,189
Common equity tier one risk-based capital required to be well capitalized to risk-weighted assets	6.50%
Tier one leveraged capital
Tier one leverage capital	$ 129,863	$ 120,924
Tier one leverage capital to average assets	9.22%	10.37%
Tier one leverage capital required for capital adequacy	$ 56,328	$ 46,630
Tier one leverage capitalrequired for capital adequacy to average assets	4.00%	4.00%
Tier one leverage capitalrequired to be well capitalized	$ 70,410	$ 58,288
Tier one leverage capitalrequired to be well capitalized to average assets	5.00%	5.00%

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