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Note 8 - Stock Split (Details Textual) - $ / shares | Jul. 07, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | May 31, 2018
--- | --- | --- | --- | ---
Common Stock, Par or Stated Value Per Share | $ 1 | $ 0.01 | $ 0.01 | $ 1
Stock Issued During Period, Percentage of Shares, Stock Split | 66.67% |  |  |
Stock Split from [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 5 |  |  |
Stock Split To [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 3 |  |  |

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- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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