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Note 9 - Stock Split (Details Textual) | Jun. 14, 2013 $ / shares | Dec. 31, 2015 $ / shares | Apr. 30, 2015 $ / shares | Dec. 31, 2014 $ / shares
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Stock Split To [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 3 |  |  |
Stock Split from [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 2 |  |  |
Common Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01
Stockholders Equity Note Stock Split Stock Dividend Percentage | 50.00% |  |  |

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- Definition Face amount or stated value per share of common stock. + 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 210.5-02.29) -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 30 -Article 5 + Details
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