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Note 6 - Share-based Compensation | 9 Months Ended
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Sep. 30, 2021
Notes to Financial Statements |
Share-based Payment Arrangement [Text Block] |
6. | SHARE-BASED COMPENSATION
The following table presents share-based compensation expenses for continuing operations included in the Company’s unaudited interim condensed consolidated statements of operations:
|  | Three Months Ended September 30, |  |  | Three Months Ended September 30, |
|  | 2021 |  |  | 2020 |
Selling, general and administrative |  | $ | 47,694 |  |  | $ | 51,157 |
Research, development and engineering |  |  | 10,356 |  |  |  | 3,073 |
|  | $ | 58,050 |  |  | $ | 54,230 |
|  | Nine Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |
Selling, general and administrative |  | $ | 207,342 |  |  | $ | 632,793 |
Research, development and engineering |  |  | 32,979 |  |  |  | 76,995 |
|  | $ | 240,321 |  |  | $ | 709,788 |

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