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Note 20 - Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Quarterly Financial Information [Table Text Block] |
(Dollar amounts in thousands) |  | Three Months Ended |
|  | March 31, 2012 |  |  | June 30, 2012 |  |  | September 30, 2012 |  |  | December 31, 2012 |
Total interest income |  | $ | 7,232 |  |  | $ | 7,223 |  |  | $ | 7,342 |  |  | $ | 6,949 |
Total interest expense |  |  | 1,686 |  |  |  | 1,646 |  |  |  | 1,602 |  |  |  | 1,513 |
Net interest income |  |  | 5,546 |  |  |  | 5,577 |  |  |  | 5,740 |  |  |  | 5,436 |
Provision for loan losses |  |  | 600 |  |  |  | 450 |  |  |  | 143 |  |  |  | 975 |
Net interest income after provision for loan losses |  |  | 4,946 |  |  |  | 5,127 |  |  |  | 5,597 |  |  |  | 4,461 |
Total noninterest income |  |  | 794 |  |  |  | 1,017 |  |  |  | 868 |  |  |  | 772 |
Total noninterest expense |  |  | 3,782 |  |  |  | 4,041 |  |  |  | 4,122 |  |  |  | 3,694 |
Income before income taxes |  |  | 1,958 |  |  |  | 2,103 |  |  |  | 2,343 |  |  |  | 1,539 |
Income taxes |  |  | 435 |  |  |  | 463 |  |  |  | 494 |  |  |  | 270 |
Net income |  | $ | 1,523 |  |  | $ | 1,640 |  |  | $ | 1,849 |  |  | $ | 1,269 |
Per share data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.86 |  |  | $ | 0.85 |  |  | $ | 0.93 |  |  | $ | 0.65 |
Diluted |  |  | 0.86 |  |  |  | 0.85 |  |  |  | 0.93 |  |  |  | 0.64 |
Average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 1,763,982 |  |  |  | 1,919,333 |  |  |  | 1,978,181 |  |  |  | 1,984,818 |
Diluted |  |  | 1,764,585 |  |  |  | 1,921,205 |  |  |  | 1,983,863 |  |  |  | 1,991,354 |
(Dollar amounts in thousands) |  | Three Months Ended |
|  | March 31, 2011 |  |  | June 30, 2011 |  |  | September 30, 2011 |  |  | December 31, 2011 |
Total interest income |  | $ | 7,359 |  |  | $ | 7,421 |  |  | $ | 7,528 |  |  | $ | 7,419 |
Total interest expense |  |  | 2,341 |  |  |  | 2,304 |  |  |  | 2,134 |  |  |  | 1,873 |
Net interest income |  |  | 5,018 |  |  |  | 5,117 |  |  |  | 5,394 |  |  |  | 5,546 |
Provision for loan losses |  |  | 865 |  |  |  | 700 |  |  |  | 920 |  |  |  | 600 |
Net interest income after provision for loan losses |  |  | 4,153 |  |  |  | 4,417 |  |  |  | 4,474 |  |  |  | 4,946 |
Total noninterest income |  |  | 699 |  |  |  | 594 |  |  |  | 686 |  |  |  | 258 |
Total noninterest expense |  |  | 3,705 |  |  |  | 4,292 |  |  |  | 3,906 |  |  |  | 3,598 |
Income before income taxes |  |  | 1,147 |  |  |  | 719 |  |  |  | 1,254 |  |  |  | 1,606 |
Income taxes |  |  | 145 |  |  |  | (1 | ) |  |  | 175 |  |  |  | 277 |
Net income |  | $ | 1,002 |  |  | $ | 720 |  |  | $ | 1,079 |  |  | $ | 1,329 |
Per share data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.62 |  |  | $ | 0.44 |  |  | $ | 0.63 |  |  | $ | 0.76 |
Diluted |  |  | 0.62 |  |  |  | 0.44 |  |  |  | 0.63 |  |  |  | 0.76 |
Average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 1,621,889 |  |  |  | 1,647,771 |  |  |  | 1,704,677 |  |  |  | 1,756,157 |
Diluted |  |  | 1,651,889 |  |  |  | 1,647,920 |  |  |  | 1,704,677 |  |  |  | 1,756,157 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=20225539&loc=d3e1280-108306 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration