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Note 2 - Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2019
Notes Tables |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 201 9 |  |  | 201 8 |  |  | 201 9 |  |  | 201 8 |
Weighted average common shares outstanding - basic |  |  | 10,411,276 |  |  |  | 10,342,674 |  |  |  | 10,398,147 |  |  |  | 10,334,492 |
Potentially dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unvested shares of restricted stock and employee stock options |  |  | - |  |  |  | 27,644 |  |  |  | 21,767 |  |  |  | 33,320 |
Weighted average common shares and common share equivalents outstanding - diluted |  |  | 10,411,276 |  |  |  | 10,370,318 |  |  |  | 10,419,914 |  |  |  | 10,367,812 |
Average number of potentially dilutive securities excluded from calculation |  |  | 618,071 |  |  |  | 275,831 |  |  |  | 423,962 |  |  |  | 189,794 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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