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Note 2 - Business Combinations (Details) (USD $) |  |  |  |  |  | 0 Months Ended | 1 Months Ended
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Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Dec. 31, 2012 | Oct. 31, 2014 Subsequent Event [Member] Virginia Heritage Bank [Member] VHB Stock Plans [Member] | Oct. 31, 2014 Subsequent Event [Member] Virginia Heritage Bank [Member] | Oct. 31, 2014 Subsequent Event [Member] Virginia Heritage Bank [Member]
Note 2 - Business Combinations (Details) [Line Items] |  |  |  |  |  |  |
Business Combination, Acquirer's Shares Issued Per Acquiree's Share |  |  |  |  |  |  | $ 0.6632
Conversion of Common Stock |  |  |  |  |  |  | $ 7.50
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares |  |  |  |  |  | 4,010,261 |
Payments to Acquire Businesses, Gross |  |  |  |  |  | $ 45,356,539 |
Preferred Stock, Shares Outstanding |  |  |  |  |  |  | 15,300
Preferred Stock, Liquidation Preference, Value |  |  |  |  |  |  | $ 15,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 456,073 | 501,334 | 582,461 | 722,155 | 448,895 |  | 401,497
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ 10.46 | $ 10.34 | $ 10.17 | $ 10.18 | $ 11.77 |  | $ 13.17

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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