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Note 6 - Share Based Compensation | 3 Months Ended
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Mar. 31, 2022
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 condensed consolidated statements of operations:
|  | Three Months Ended March 31, |
|  | 2022 |  |  | 2021 |
Selling, general and administrative |  | $ | 92,426 |  |  | $ | 128,944 |
Research, development and engineering |  |  | 17,271 |  |  |  | 12,204 |
|  | $ | 109,697 |  |  | $ | 141,148 |

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