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Note 15 - Shareholders' Equity - Summary of Actual Capital Amount and Well Capitalized Total Risk-Based, Tier I Risk-Based, and Tier I Leverage Ratios (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Common equity Tier 1 capital (to risk-weighted assets), Actual Regulatory Capital, Amount	$ 73,433	$ 71,887
Common equity Tier 1 capital (to risk-weighted assets), Actual Regulatory Capital, Ratio	19.01%	22.19%
Common equity Tier 1 capital (to risk-weighted assets), Minimum Requirement	5.125%	4.50%
Common equity Tier 1 capital (to risk-weighted assets), To Be Well Capitalized	6.50%	6.50%
Tier 1 capital (to risk-weighted assets), Actual Regulatory Capital, Amount	$ 73,433	$ 71,887
Tier 1 capital (to risk-weighted assets), Actual Regulatory Capital, Ratio	19.01%	22.19%
Tier 1 capital (to risk-weighted assets), Minimum Requirement	6.625%	6.00%
Tier 1 capital (to risk-weighted assets), To Be Well Capitalized	8.00%	8.00%
Total capital (to risk-weighted assets), Actual Regulatory Capital, Amount	$ 78,279	$ 75,668
Total capital (to risk-weighted assets), Actual Regulatory Capital, Ratio	20.26%	23.35%
Total capital (to risk-weighted assets), Minimum Requirement	8.625%	8.00%
Total capital (to risk-weighted assets), To Be Well Capitalized	10.00%	10.00%
Tier 1 leverage (to average assets), Actual Regulatory Capital, Amount	$ 73,433	$ 71,887
Tier 1 leverage (to average assets), Actual Regulatory Capital, Ratio	12.27%	13.02%
Tier 1 leverage (to average assets), Minimum Requirement	4.00%	4.00%
Tier 1 leverage (to average assets), To Be Well Capitalized	5.00%	5.00%

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Common Equity Tier 1 Risk Based Capital as defined in the regulations.

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