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Note 11 - Share-based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2021
Notes Tables |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  |  |  |  |  | Weighted Average |
|  | Number of |  |  | Grant-Date Fair Value |
|  | Shares |  |  | Per Share |
Unvested as of December 31, 2020 |  |  | 1,332,884 |  |  | $ | 1.86 |
Granted |  |  | 80,014 |  |  | $ | 2.06 |
Vested |  |  | (241,805 | ) |  | $ | 2.14 |
Unvested as of March 31, 2021 |  |  | 1,171,093 |  |  | $ | 1.84 |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended March 31, |
|  | 2021 |  |  | 2020 |
Share-based compensation expense: |  |  |  |  |  |  |  |
Cost of sales |  | $ | 26 |  |  | $ | 22 |
Selling, general and administrative |  |  | 193 |  |  |  | 286 |
Net effect of share-based compensation expense on net income |  | $ | 219 |  |  | $ | 308 |
Reduction in earnings per share: |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 0.01 |  |  | $ | 0.02 |
Diluted earnings per share |  | $ | 0.01 |  |  | $ | 0.02 |

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