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Note 1 - Nature of Activities and Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2022
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | For the three months ended September 30, |  |  | For the nine months ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Ethanol and high-grade alcohol sales |  | $ | 44,673 |  |  | $ | 39,131 |  |  | $ | 130,224 |  |  | $ | 111,220 |
Wet distiller's grains sales |  |  | 13,003 |  |  |  | 8,919 |  |  |  | 39,669 |  |  |  | 30,584 |
Other sales |  |  | 3,231 |  |  |  | 1,782 |  |  |  | 8,947 |  |  |  | 5,086 |
|  | $ | 60,908 |  |  | $ | 49,832 |  |  | $ | 178,840 |  |  | $ | 146,890 |
|  | For the three months ended September 30, |  |  | For the nine months ended September 30, 2022 |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Biodiesel sales |  | $ | 10,828 |  |  | $ | - |  |  | $ | 10,828 |  |  | $ | 465 |
Other sales |  |  | 95 |  |  |  | 63 |  |  |  | 113 |  |  |  | 231 |
|  | $ | 10,923 |  |  | $ | 63 |  |  | $ | 10,941 |  |  | $ | 696 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
|  | As of |
|  | September 30, 2022 |  |  | September 30, 2021 |
Series B preferred (post split basis) |  |  | 127 |  |  |  | 129 |
Common stock options and warrants |  |  | 5,064 |  |  |  | 3,929 |
Debt with conversion feature at $30 per share of common stock |  |  | 1,256 |  |  |  | 1,280 |
Total number of potentially dilutive shares excluded from the diluted net (loss) per share calculation |  |  | 6,447 |  |  |  | 5,338 |

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