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Earnings Per Share. (Details) - Schedule of computation of basic and diluted earnings per share - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Schedule of computation of basic and diluted earnings per share [Abstract] |  |  |  |
Net income (Loss) attributed to Alto Ingredients, Inc. | $ (3,132) | $ 15,215 | $ 9,936 | $ 5,079
Less: Preferred stock dividends | (319) | (319) | (946) | (949)
Diluted income per share: |  |  |  |
Add: Dilutive securities |  | 3,196 | 1,258 | 2,338
Income (Loss) available to common stockholders |  | $ 14,896 | $ 8,990 | $ 4,130
Income (Loss) available to common stockholders (in Shares) |  | 61,699,000 | 72,260,000 | 57,958,000
Income (Loss) available to common stockholders (in Dollars per share) |  | $ 0.24 | $ 0.12 | $ 0.07
Basic and Diluted loss per share: |  |  |  |
Income (Loss) available to common stockholders | $ (3,451) | $ 14,896 | $ 8,990 | $ 4,130
Income (Loss) available to common stockholders (in Shares) | 71,383,000 | 58,503,000 | 71,002,000 | 55,620,000
Income (Loss) available to common stockholders (in Dollars per share) | $ (0.05) | $ 0.25 | $ 0.13 | $ 0.07

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