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Note 2 - Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2021
Notes Tables |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Weighted average common shares outstanding - basic |  |  | 10,442,916 |  |  |  | 10,252,490 |  |  |  | 10,386,183 |  |  |  | 10,236,672 |
Potentially dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unvested shares of restricted stock and employee stock options |  |  | 322,020 |  |  |  | 6,427 |  |  |  | 259,198 |  |  |  | - |
Weighted average common shares and common share equivalents outstanding - diluted |  |  | 10,764,936 |  |  |  | 10,258,917 |  |  |  | 10,645,381 |  |  |  | 10,236,672 |
Average number of potentially dilutive securities excluded from calculation |  |  | 274,345 |  |  |  | 711,499 |  |  |  | 307,069 |  |  |  | 719,832 |

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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=124432515&loc=d3e3550-109257 + Details
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