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Note 8 - Regulatory and Operational Matters - Regulatory Capital Amounts (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
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Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio |  | 10.00% |
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio |  | 8.00% |
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio |  | 5.00% |
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 6.50% |
Parent Company [Member] |  |  |
Total Capital (to Risk Weighted Assets) Actual Amount |  | $ 71,547 | $ 66,254
Total Capital (to Risk Weighted Assets) Actual Ratio |  | 10.309% | 10.603%
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 |  | $ 55,522 | $ 49,989
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 8.00% | 8.00%
Tier 1 Capital (to Risk Weighted Assets) Actual Amount |  | $ 65,595 | $ 61,571
Tier 1 Capital (to Risk Weighted Assets) Actual Ratio |  | 9.451% | 9.854%
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 |  | $ 41,641 | $ 37,491
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 6.00% | 6.00%
Common Equity Tier 1 Capital (to Risk Weighted Assets) Actual Amount |  | $ 57,595 | $ 53,571
Common Equity Tier 1 Capital (to Risk Weighted Assets) Actual Ratio |  | 8.299% | 8.573%
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] |  |
Tier 1 Capital (to Average 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 Amount |  | $ 31,231 | $ 28,119
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 4.50% | 4.50%
Tier 1 Capital (to Average Assets) Actual Amount |  | $ 65,595 | $ 61,571
Tier 1 Capital (to Average Assets) Actual Ratio |  | 8.804% | 9.296%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | [1] |  |
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes Ratio |  | 4.00% | 4.00%
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes Amount |  | $ 29,803 | $ 26,494
Subsidiaries [Member] |  |  |
Total Capital (to Risk Weighted Assets) Actual Amount |  | $ 80,258 | $ 74,303
Total Capital (to Risk Weighted Assets) Actual Ratio |  | 11.594% | 11.928%
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | [1] | $ 69,226 | $ 62,292
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | [1] | 10.00% | 10.00%
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount | [2] | $ 64,034 | $ 53,727
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio | [2] | 9.25% | 8.625%
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount |  | $ 55,381 | $ 49,834
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 8.00% | 8.00%
Tier 1 Capital (to Risk Weighted Assets) Actual Amount |  | $ 74,306 | $ 69,620
Tier 1 Capital (to Risk Weighted Assets) Actual Ratio |  | 10.734% | 11.176%
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | [1] | $ 55,381 | $ 49,834
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | [1] | 8.00% | 8.00%
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount | [2] | $ 50,189 | $ 41,269
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio | [2] | 7.25% | 6.625%
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount |  | $ 41,536 | $ 37,375
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 6.00% | 6.00%
Common Equity Tier 1 Capital (to Risk Weighted Assets) Actual Amount |  | $ 74,306 | $ 69,620
Common Equity Tier 1 Capital (to Risk Weighted Assets) Actual Ratio |  | 10.734% | 11.176%
Common Equity Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | [1] | $ 44,997 | $ 40,490
Common Equity Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | [1] | 6.50% | 6.50%
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Amount | [2] | $ 39,805 | $ 31,925
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes With Capital Buffer Ratio | [2] | 5.75% | 5.125%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | [1] | 5.00% | 5.00%
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount |  | $ 31,152 | $ 28,031
Common Equity Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 4.50% | 4.50%
Tier 1 Capital (to Average Assets) Actual Amount |  | $ 74,306 | $ 69,620
Tier 1 Capital (to Average Assets) Actual Ratio |  | 9.974% | 10.518%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | [1] | $ 37,250 | $ 33,096
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes Ratio |  | 4.00% | 4.00%
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes Amount |  | $ 29,800 | $ 26,477
[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.

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- Definition The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 + Details
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- Definition The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Amount of Common Equity Tier 1 Risk-based Capital required to be categorized as well-capitalized under regulatory framework for prompt corrective action. + References No definition available. + Details
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- Definition Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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 The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Tier 1 Risk Based Capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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 The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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