Earnings Per Share. (Tables)

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted earnings per share

	Three Months Ended June 30, 2021
	Income Numerator			Shares Denominator		Per-Share Amount
Net income attributed to Alto Ingredients, Inc.	$	8,390
Less: Preferred stock dividends		(315	)
Basic income per share:
Income available to common stockholders	$	8,075			71,260	$	0.11
Add: Dilutive instruments		—			669
Diluted income per share:
Income available to common stockholders	$	8,075			71,929	$	0.11

	Three Months Ended June 30, 2020
	Income Numerator			Shares Denominator		Per-Share Amount
Net income attributed to Alto Ingredients, Inc.	$	14,964
Less: Preferred stock dividends		(315	)
Basic and diluted income per share:
Income available to common stockholders	$	14,649			54,498	$	0.27

	Six Months Ended June 30, 2021
	Income Numerator			Shares Denominator		Per-Share Amount
Net income attributed to Alto Ingredients, Inc.	$	13,068
Less: Preferred stock dividends		(627	)
Basic income per share:
Income available to common stockholders	$	12,441			70,808	$	0.18
Add: Dilutive instruments		—			1,153
Diluted income per share:
Income available to common stockholders	$	12,441			71,961	$	0.17

	Six Months Ended June 30, 2020
	Loss Numerator			Shares Denominator		Per-Share Amount
Net loss attributed to Alto Ingredients, Inc.	$	(10,136	)
Less: Preferred stock dividends		(630	)
Basic and diluted loss per share:
Loss available to common stockholders	$	(10,766	)		54,163	$	(0.20	)