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Note 7 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Dividends Declared [Table Text Block] |
Declaration date |  | Dividend |  | Total paid
March 1, 2021 |  | $ | 0.05 |  |  | $ | 680 |
June 1, 2021 |  |  | 0.06 |  |  |  | 817 |
September 1, 2021 |  |  | 0.06 |  |  |  | 822 |
December 1, 2021 |  |  | 0.06 |  |  |  | 822 |
March 1, 2022 |  |  | 0.06 |  |  |  | 822 |
June 1, 2022 |  |  | 0.06 |  |  |  | 827 |
September 1, 2022 |  |  | 0.06 |  |  |  | 829 |
December 1, 2022 |  |  | 0.06 |  |  |  | 833 |

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