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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Years Ended December 31, |
|  | 2019 |  |  | 2018 |
Weighted average common shares outstanding–basic |  |  | 10,373,164 |  |  |  | 10,347,947 |
Potentially dilutive securities: |  |  |  |  |  |  |  |
Unvested shares of restricted stock and employee stock options |  |  | 18,811 |  |  |  | 34,247 |
Weighted average common shares and common share equivalents outstanding–diluted |  |  | 10,391,975 |  |  |  | 10,382,194 |
Average number of potentially dilutive securities excluded from calculation |  |  | 523,485 |  |  |  | 216,420 |

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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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