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Note 17 - 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, 2018 | Dec. 31, 2017
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Common equity Tier 1 capital (to risk-weighted assets), Actual Regulatory Capital, Amount | $ 70,177 | $ 74,383
Common equity Tier 1 capital (to risk-weighted assets), Actual Regulatory Capital, Ratio | 12.62% | 18.41%
Common equity Tier 1 capital (to risk-weighted assets), Minimum Requirement | 6.375% | 5.75%
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 | $ 70,177 | $ 74,383
Tier 1 capital (to risk-weighted assets), Actual Regulatory Capital, Ratio | 12.62% | 18.41%
Tier 1 capital (to risk-weighted assets), Minimum Requirement | 7.875% | 7.25%
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 | $ 75,232 | $ 79,157
Total capital (to risk-weighted assets), Actual Regulatory Capital, Ratio | 13.53% | 19.60%
Total capital (to risk-weighted assets), Minimum Requirement | 9.875% | 9.25%
Total capital (to risk-weighted assets), To Be Well Capitalized | 10.00% | 10.00%
Tier 1 leverage (to average assets), Actual Regulatory Capital, Amount | $ 70,177 | $ 74,383
Tier 1 leverage (to average assets), Actual Regulatory Capital, Ratio | 8.96% | 11.89%
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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- Definition The minimum Common Equity Tier 1 Risk Based Capital Ratio (Common Equity Tier 1 Capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
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- Definition The Common Equity Tier 1 Risk Based Capital ratio (Common Equity Tier 1 Capital divided by risk-weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References No definition available. + Details
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- Definition The amount of total capital as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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