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Note 10 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2021
Common Class A [Member] |
Notes Tables |
Dividends Declared [Table Text Block] |
Month |  | 2021 |  |  | 2020 |
|  | Cash Dividend |  |  | Cash Dividend |
March 31 |  | $ | 0.101 |  |  | $ | — |
June 30 |  |  | 0.102 |  |  |  | — |
September 30 |  |  | 0.103 |  |  |  | — |
December 31 |  |  | 0.104 |  |  |  | 0.100 |
Total |  | $ | 0.410 |  |  | $ | 0.100 |
Month |  | 2021 |  |  | 2020 |
|  | Distributions Declared |  |  | Distributions Declared |
January |  | $ | — |  |  | $ | — |
February |  |  | — |  |  |  | — |
March |  |  | — |  |  |  | — |
April |  |  | — |  |  |  | — |
May |  |  | — |  |  |  | — |
June |  |  | 0.10417 |  |  |  | — |
July |  |  | 0.19531 |  |  |  | — |
August |  |  | 0.19531 |  |  |  | — |
September |  |  | 0.19531 |  |  |  | — |
October |  |  | 0.19531 |  |  |  | — |
November |  |  | 0.19531 |  |  |  | — |
December 31 |  |  | 0.19531 |  |  |  | — |
Total |  | $ | 1.27603 |  |  |  | — |

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