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Note 2 - Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Weighted average common shares outstanding - basic |  |  | 10,496,188 |  |  |  | 10,269,995 |  |  |  | 10,422,851 |  |  |  | 10,247,779 |
Potentially dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unvested shares of restricted stock and employee stock options |  |  | 296,102 |  |  |  | 17,567 |  |  |  | 271,500 |  |  |  | - |
Weighted average common shares and common share equivalents outstanding - diluted |  |  | 10,792,290 |  |  |  | 10,287,562 |  |  |  | 10,694,351 |  |  |  | 10,247,779 |
Average number of potentially dilutive securities excluded from calculation |  |  | 237,545 |  |  |  | 631,392 |  |  |  | 283,894 |  |  |  | 722,538 |

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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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