Alto Ingredients (ALTO) 10-Q 10 Aug 21 2021 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Aug. 09, 2021
Document Information Line Items
Entity Registrant Name	ALTO INGREDIENTS, INC.
Trading Symbol	ALTO
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		72,806,563
Amendment Flag	false
Entity Central Index Key	0000778164
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Quarterly Report	true
Entity File Number	000-21467
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	41-2170618
Entity Address, Address Line One	1300 South Second Street
Entity Address, City or Town	Pekin
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	61554
City Area Code	(916)
Local Phone Number	403-2123
Title of 12(b) Security	Common Stock, $0.001 par value
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Document Transition Report	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 50,796	$ 47,667	[1]
Accounts receivable, net (net of allowance for doubtful accounts of $363 and $260, respectively)	67,043	43,491	[1]
Inventories	58,251	37,925	[1]
Prepaid inventory	531	891	[1]
Derivative instruments	28,498	17,149	[1]
Assets held-for-sale	30,199	58,295	[1]
Other current assets	8,932	8,628	[1]
Total current assets	244,250	214,046	[1]
Property and equipment, net	221,327	229,486	[1]
Other Assets:
Right of use operating lease assets, net	13,509	11,046	[1]
Notes receivable	12,775	14,337	[1]
Intangible assets	2,678	2,678	[1]
Other assets	4,665	5,225	[1]
Total other assets	33,627	33,286	[1]
Total Assets	499,204	476,818	[1]
Current Liabilities:
Accounts payable – trade	30,029	13,047	[1]
Accrued liabilities	15,977	11,101	[1]
Current portion – operating leases	3,171	2,180	[1]
Current portion – long-term debt	23,660	25,533	[1]
Derivative instruments	20,174
Liabilities held-for-sale	10,478	19,542	[1]
Other current liabilities	7,255	15,524	[1]
Total current liabilities	110,744	86,927	[1]
Long-term debt, net of current portion	56,848	71,807	[1]
Operating leases, net of current portion	10,188	8,715	[1]
Other liabilities	13,405	13,134	[1]
Total Liabilities	191,185	180,583	[1]
Commitments and Contingencies (Note 7)
Alto Ingredients, Inc. Stockholders’ Equity:
Preferred stock, $0.001 par value; 10,000 shares authorized; Series A: 1,684 shares authorized; no shares issued and outstanding as of June 30, 2021 and December 31, 2020; Series B: 1,581 shares authorized; 927 shares issued and outstanding as of June 30, 2021 and December 31, 2020; liquidation preference of $20,290 as of June 30, 2021	1	1	[1]
Common stock, $0.001 par value; 300,000 shares authorized; 72,811 and 72,487 shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively	73	72	[1]
Additional paid-in capital	1,035,980	1,036,638	[1]
Accumulated other comprehensive loss	(3,878)	(3,878)	[1]
Accumulated deficit	(724,157)	(736,598)	[1]
Total Stockholders’ Equity	308,019	296,235	[1]
Total Liabilities and Stockholders’ Equity	499,204	476,818	[1]
Non-Voting Common Stock
Alto Ingredients, Inc. Stockholders’ Equity:
Common stock, $0.001 par value; 300,000 shares authorized; 72,811 and 72,487 shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively
[1]	Amounts derived from the audited consolidated financial statements for the year ended December 31, 2020.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts receivable, net of allowance (in Dollars)	$ 363	$ 260
Preferred stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000	10,000
Preferred stock, liquidation preference (in Dollars)	$ 20,290
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	300,000	300,000
Common stock, shares issued	72,811	72,487
Common stock, shares outstanding	72,811	72,487
Series A Preferred Stock
Preferred stock, shares authorized	1,684	1,684
Preferred stock, shares issued
Preferred stock, shares outstanding
Series B Preferred Stock
Preferred stock, shares authorized	1,581	1,581
Preferred stock, shares issued	927	927
Preferred stock, shares outstanding	927	927
Non-Voting Common Stock
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	3,553	3,553
Common stock, shares issued	1	1
Common stock, shares outstanding	1	1

Consolidated Statements of Oper

Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 298,110	$ 212,074	$ 516,844	$ 523,478
Cost of goods sold	282,877	180,892	487,774	505,186
Gross profit	15,233	31,182	29,070	18,292
Selling, general and administrative expenses	7,230	8,629	14,244	18,841
Asset impairments	1,900		3,100
Income (loss) from operations	6,103	22,553	11,726	(549)
Interest expense, net	(1,045)	(4,647)	(2,930)	(9,954)
Income from loan forgiveness	3,887		3,887
Fair value adjustments		(1,314)		(641)
Other income (expense), net	(555)	(1,738)	385	(1,158)
Income (loss) before benefit for income taxes	8,390	14,854	13,068	(12,302)
Benefit for income taxes
Consolidated net income (loss)	8,390	14,854	13,068	(12,302)
Net loss attributed to noncontrolling interests		110		2,166
Net income (loss) attributed to Alto Ingredients, Inc.	8,390	14,964	13,068	(10,136)
Preferred stock dividends	(315)	(315)	(627)	(630)
Net income (loss) available to common stockholders	$ 8,075	$ 14,649	$ 12,441	$ (10,766)
Net income (loss) per share, basic (in Dollars per share)	$ 0.11	$ 0.27	$ 0.18	$ (0.20)
Net income (loss) per share, diluted (in Dollars per share)	$ 0.11	$ 0.27	$ 0.17	$ (0.20)
Weighted-average shares outstanding, basic (in Shares)	71,260	54,498	70,808	54,163
Weighted-average shares outstanding, diluted (in Shares)	71,929	54,498	71,961	54,163

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020
Operating Activities:
Consolidated net income (loss)	$ 13,068		$ (12,302)
Adjustments to reconcile consolidated net income (loss) to net cash provided by operating activities:
Depreciation	11,670		18,806
Asset impairments	3,100
Income from loan forgiveness	(3,887)
Non-cash compensation	1,655		1,441
Amortization of deferred financing fees	701		497
Fair value adjustments			641
Interest added to debt			133
Bad debt expense	143		1
Changes in operating assets and liabilities:
Accounts receivable	(23,694)		25,435
Inventories	(18,526)		14,274
Prepaid expenses and other assets	8,615		(403)
Prepaid inventory	361		(1,652)
Operating leases	(2,069)		(2,348)
Assets held-for-sale	(2,915)		1,012
Liabilities held-for-sale	1,445		9,345
Accounts payable and accrued expenses	11,096		(9,225)
Net cash provided by operating activities	763		45,655
Investing Activities:
Proceeds from Madera Sale	19,500
Proceeds from PAL Sale			19,896
Additions to property and equipment	(4,192)		(2,510)
Net cash provided by investing activities	15,308		17,386
Financing Activities:
Net proceeds from (payments on) Kinergy’s line of credit	24,406		(36,897)
Proceeds from stock option exercises	462
Principal payments on borrowings	(37,810)		(25,500)
Proceeds from issuance of common stock			282
Proceeds from borrowings			9,860
Net cash used in financing activities	(12,942)		(52,255)
Net change in cash and cash equivalents	3,129		10,786
Cash and cash equivalents at beginning of period	47,667	[1]	18,997
Cash and cash equivalents at end of period	50,796		29,783
Supplemental Information:
Interest paid	2,723		9,733
Accrued preferred stock dividends	$ 627		$ 630
[1]	Amounts derived from the audited consolidated financial statements for the year ended December 31, 2020.

Consolidated Statements of Stoc

Consolidated Statements of Stockholders’ Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accum. Other Comprehensive Income (Loss)	Non-Controlling Interests	Total
Balances at Dec. 31, 2019	$ 1	$ 56	$ 942,307	$ (720,214)	$ (2,370)	$ 7,265	$ 227,045
Balances (in Shares) at Dec. 31, 2019	927	55,508
Restricted stock issued to employees and directors, net of cancellations and tax		$ (4)	3				(1)
Restricted stock issued to employees and directors, net of cancellations and tax (in Shares)		(38)
Stock-based compensation			865				865
Issuances of common stock		$ 4	278				282
Issuances of common stock (in Shares)		421
Preferred stock dividends				(315)			(315)
Net income (loss)				(25,100)		(2,056)	(27,156)
Balances at Mar. 31, 2020	$ 1	$ 56	943,453	(745,629)	(2,370)	5,209	200,720
Balances (in Shares) at Mar. 31, 2020	927	55,891
Balances at Dec. 31, 2019	$ 1	$ 56	942,307	(720,214)	(2,370)	7,265	227,045
Balances (in Shares) at Dec. 31, 2019	927	55,508
Preferred stock dividends							(630)
Net income (loss)							(12,302)
Balances at Jun. 30, 2020	$ 1	$ 55	944,035	(730,980)	(2,370)		210,741
Balances (in Shares) at Jun. 30, 2020	927	55,482
Balances at Mar. 31, 2020	$ 1	$ 56	943,453	(745,629)	(2,370)	5,209	200,720
Balances (in Shares) at Mar. 31, 2020	927	55,891
Restricted stock issued to employees and directors, net of cancellations and tax		$ (1)	6				5
Restricted stock issued to employees and directors, net of cancellations and tax (in Shares)		(409)
Stock-based compensation			576				576
Preferred stock dividends				(315)			(315)
Sale of interests in PAL						(5,099)	(5,099)
Net income (loss)				14,964		(110)	14,854
Balances at Jun. 30, 2020	$ 1	$ 55	944,035	(730,980)	(2,370)		210,741
Balances (in Shares) at Jun. 30, 2020	927	55,482
Balances at Dec. 31, 2020	$ 1	$ 72	1,036,638	(736,598)	(3,878)		296,235
Balances (in Shares) at Dec. 31, 2020	927	72,487
Restricted stock issued to employees and directors, net of cancellations and tax		$ 1	(186)				(185)
Restricted stock issued to employees and directors, net of cancellations and tax (in Shares)		550
Stock-based compensation			804				804
Stock option exercises			462				462
Stock option exercises (in Shares)		124
Preferred stock dividends				(312)			(312)
Net income (loss)				4,678			4,678
Balances at Mar. 31, 2021	$ 1	$ 73	1,037,718	(732,232)	(3,878)		301,682
Balances (in Shares) at Mar. 31, 2021	927	73,161
Balances at Dec. 31, 2020	$ 1	$ 72	1,036,638	(736,598)	(3,878)		296,235
Balances (in Shares) at Dec. 31, 2020	927	72,487
Preferred stock dividends							(627)
Net income (loss)							13,068
Balances at Jun. 30, 2021	$ 1	$ 73	1,035,980	(724,157)	(3,878)		308,019
Balances (in Shares) at Jun. 30, 2021	927	72,811
Balances at Mar. 31, 2021	$ 1	$ 73	1,037,718	(732,232)	(3,878)		301,682
Balances (in Shares) at Mar. 31, 2021	927	73,161
Restricted stock issued to employees and directors, net of cancellations and tax			(2,589)				(2,589)
Restricted stock issued to employees and directors, net of cancellations and tax (in Shares)		(350)
Stock-based compensation			851				851
Preferred stock dividends				(315)			(315)
Net income (loss)				8,390			8,390
Balances at Jun. 30, 2021	$ 1	$ 73	$ 1,035,980	$ (724,157)	$ (3,878)		$ 308,019
Balances (in Shares) at Jun. 30, 2021	927	72,811

Organization and Basis of Prese

Organization and Basis of Presentation.	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION AND BASIS OF PRESENTATION.	1. ORGANIZATION Organization and Business The Company is a leading producer and marketer of specialty alcohols and essential ingredients. The Company also produces and markets fuel-grade ethanol. The Company’s production facilities in Pekin, Illinois are located in the heart of the Corn Belt, benefit from low-cost and abundant feedstock and allow for access to many additional domestic markets. In addition, the Company’s ability to load unit trains and barges from these facilities allows for greater access to international markets. The Company’s three production facilities in California, Oregon and Idaho, located in close proximity to both feed and fuel-grade ethanol customers, enjoy unique advantages in efficiency, logistics and product pricing. The Company has a combined production capacity of 410 million gallons per year, markets, on an annualized basis, over 500 million gallons of alcohols, and produces, on an annualized basis, nearly 1.5 million tons of essential ingredients on a dry matter basis, such as dried yeast, corn gluten meal, corn gluten feed, and distillers grains and liquid feed used in commercial animal feed and pet foods. The Company focuses on four key markets: Health, Home & Beauty Food & Beverage Essential Ingredients Renewable Fuels As of June 30, 2021, the Company was operating at approximately 71% of its 410 million gallon annual production capacity. As market conditions change, the Company may increase, decrease or idle production at one or more operating facilities or resume operations at any idled facility. Basis of Presentation – Interim Financial Statements Accounts Receivable and Allowance for Doubtful Accounts The Company maintains an allowance for doubtful accounts for balances that appear to have specific collection issues. The collection process is based on the age of the invoice and requires attempted contacts with the customer at specified intervals. If, after a specified number of days, the Company has been unsuccessful in its collection efforts, a bad debt allowance is recorded for the balance in question. Delinquent accounts receivable are charged against the allowance for doubtful accounts once uncollectibility has been determined. The factors considered in reaching this determination are the apparent financial condition of the customer and the Company’s success in contacting and negotiating with the customer. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of ability to make payments, additional allowances may be required. Of the accounts receivable balance, approximately $61,501,000 and $35,839,000 at June 30, 2021 and December 31, 2020, respectively, were used as collateral under Kinergy’s operating line of credit. The allowance for doubtful accounts was $363,000 and $260,000 as of June 30, 2021 and December 31, 2020, respectively. The Company recorded a bad debt expense of $52,000 and a bad debt recovery of $18,000 for the three months ended June 30, 2021 and 2020, respectively. The Company recorded a bad debt expense of $143,000 and $1,000 for the six months ended June 30, 2021 and 2020, respectively. The Company does not have any off-balance sheet credit exposure related to its customers. Financial Instruments Estimates and Assumptions

Assets and Liabilities Held-For

Assets and Liabilities Held-For-Sale.	6 Months Ended
	Jun. 30, 2021
Business Combinations [Abstract]
ASSETS AND LIABILITIES HELD-FOR-SALE.	2. ASSETS AND LIABILITIES HELD-FOR-SALE. In October 2020, the Company’s Board of Directors approved a plan to sell the Company’s fuel-grade ethanol production facilities located in Madera and Stockton, California. As a result, the Company determined the related long-lived asset groups should be classified as held-for-sale at December 31, 2020. During the six months ended June 30, 2021, the Company provided for an additional impairment charge of $1.2 million based on revised fair value estimates. On May 14, 2021, the Company closed the sale of its Madera facility for total consideration of $28.3 million, comprised of $19.5 million in cash and $8.8 million in assumption of liabilities, resulting in a net loss on sale of less than $0.1 million, recorded as other income (expense), net in the Company’s consolidated statements of operations. All of the cash proceeds were used to repay a significant portion of the Company’s term debt and accrued interest. The Company continues to market its Stockton facility for sale. In June 2021, the Company agreed to a plan to sell certain assets of the Company’s idled facility in Canton, Illinois. As a result, the Company determined the related long-lived asset groups should be classified as held-for-sale at June 30, 2021. During the three months ended June 30, 2021, the Company recorded an estimated impairment charge of $1.9 million based on fair value estimates. The Company classified the following assets and liabilities as held-for-sale as of June 30, 2021 (in thousands): Stockton Canton Property and equipment, net $ 19,535 $ 1,000 Right of use operating lease assets, net 9,664 — Assets held-for-sale $ 29,199 $ 1,000 Stockton Canton Liabilities held-for-sale – operating leases $ 10,478 $ — The Company classified the following assets and liabilities as held-for-sale as of December 31, 2020 (in thousands): Stockton Madera Property and equipment, net $ 19,535 $ 29,013 Right of use operating lease assets, net 9,747 — Assets held-for-sale $ 29,282 $ 29,013 Stockton Madera Operating lease obligations $ 10,435 $ — Assessment financing — 9,107 Liabilities held-for-sale $ 10,435 $ 9,107 For the three months ended June 30, 2021, net sales attributed to the results of operations for Stockton and Madera were $0.4 million and less than $0.1 million, respectively. For the three months ended June 30, 2020, net sales attributed to the results of operations for Stockton and Madera were $0.5 million and $1.0 million, respectively. For the three months ended June 30, 2021, pre-tax loss attributed to the results of operations for Stockton and Madera was $1.4 million and $0.2 million, respectively. For the three months ended June 30, 2020, pre-tax loss attributed to the results of operations for Stockton and Madera was $1.2 million and $1.8 million, respectively. For the six months ended June 30, 2021, net sales attributed to the results of operations for Stockton and Madera were $0.6 million and less than $0.1 million, respectively. For the six months ended June 30, 2020, net sales attributed to the results of operations for Stockton and Madera were $22.4 million and $22.5 million, respectively. For the six months ended June 30, 2021, pre-tax loss attributed to the results of operations for Stockton and Madera was $2.2 million and $1.8 million, respectively. For the six months ended June 30, 2020, pre-tax loss attributed to the results of operations for Stockton and Madera was $3.5 million and $3.6 million, respectively.

Segments.

Segments.	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
SEGMENTS.	3. SEGMENTS. The Company reports its financial and operating performance in three segments: (1) marketing and distribution, which includes marketing and merchant trading for Company-produced alcohols and essential ingredients on an aggregated basis, and third-party fuel-grade ethanol (2) Pekin production, which includes the production and sale of alcohols and essential ingredients produced at the Company’s Pekin, Illinois campus (“Pekin Campus”), and (3) Other production, which includes the production and sale of fuel-grade ethanol and essential ingredients produced at all of the Company’s other production facilities on an aggregated basis (“Other production”), none of which are individually so significant as to be considered a reportable segment. The following tables set forth certain financial data for the Company’s operating segments (in thousands): Three Months Ended Six Months Ended 2021 2020 2021 2020 Net Sales Marketing and distribution: Alcohol sales, gross $ 86,299 $ 71,117 $ 143,309 $ 128,623 Alcohol sales, net 532 307 984 736 Intersegment sales 2,618 1,838 4,862 6,153 Total marketing and distribution sales 89,449 73,262 149,155 135,512 Pekin Campus production, recorded as gross: Alcohol sales $ 132,296 $ 94,538 $ 227,380 $ 178,669 Essential ingredient sales 49,578 33,633 94,655 73,504 Intersegment sales 316 263 628 680 Total Pekin Campus sales 182,190 128,434 322,663 252,853 Other production, recorded as gross: Alcohol sales $ 22,153 $ 9,796 $ 38,121 $ 109,025 Essential ingredient sales 7,252 2,683 12,395 32,921 Intersegment sales 332 410 637 701 Total Other production sales 29,737 12,889 51,153 142,647 Intersegment eliminations (3,266 ) (2,511 ) (6,127 ) (7,534 ) Net sales as reported $ 298,110 $ 212,074 $ 516,844 $ 523,478 Cost of goods sold: Marketing and distribution $ 85,746 $ 69,101 $ 139,705 $ 126,240 Pekin Campus production 171,547 95,070 299,250 221,840 Other production 27,325 18,354 51,442 160,663 Intersegment eliminations (1,741 ) (1,633 ) (2,623 ) (3,557 ) Cost of goods sold as reported $ 282,877 $ 180,892 $ 487,774 $ 505,186 Income (loss) before benefit for income taxes: Marketing and distribution $ 1,678 $ 2,043 $ 5,411 $ 4,286 Pekin Campus production 10,726 27,459 20,736 19,280 Other production (1,666 ) (10,252 ) (7,609 ) (33,816 ) Corporate activities (2,348 ) (4,396 ) (5,470 ) (2,052 ) $ 8,390 $ 14,854 $ 13,068 $ (12,302 ) Depreciation: Pekin Campus production $ 4,326 $ 4,371 $ 8,671 $ 8,757 Other production 1,468 3,697 2,966 9,982 Corporate activities 17 33 33 67 $ 5,811 $ 8,101 $ 11,670 $ 18,806 Interest expense: Marketing and distribution $ 222 $ 313 $ 426 $ 940 Pekin Campus production 73 1,594 591 3,679 Other production 46 29 182 60 Corporate activities 704 2,711 1,731 5,275 $ 1,045 $ 4,647 $ 2,930 $ 9,954 The following table sets forth the Company’s total assets by operating segment (in thousands): June 30, December 31, Total assets: Marketing and distribution $ 140,204 $ 89,337 Pekin Campus production 254,206 234,439 Other production 83,330 102,409 Corporate assets 21,464 50,633 $ 499,204 $ 476,818

Inventories.

Inventories.	6 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
INVENTORIES.	4. INVENTORIES. Inventories consisted primarily of bulk ethanol, specialty alcohols, corn, essential ingredients and unleaded fuel, and are valued at the lower of cost or net realizable value, with cost determined on a first-in, first-out basis. Inventory is net of valuation adjustments of $1,800,000 and $1,033,000 as of June 30, 2021 and December 31, 2020, respectively. Inventory balances consisted of the following (in thousands): June 30, December 31, Finished goods $ 40,497 $ 25,154 Work in progress 5,701 4,333 Raw materials 10,788 7,074 Other 1,265 1,364 Total $ 58,251 $ 37,925

Derivatives.

Derivatives.	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES.	5. DERIVATIVES. The business and activities of the Company expose it to a variety of market risks, including risks related to changes in commodity prices. The Company monitors and manages these financial exposures as an integral part of its risk management program. This program recognizes the unpredictability of financial markets and seeks to reduce the potentially adverse effects that market volatility could have on operating results. Commodity Risk – Cash Flow Hedges Commodity Risk – Non-Designated Hedges Non Designated Derivative Instruments As of June 30, 2021 Assets Liabilities Type of Instrument Balance Sheet Location Fair Balance Sheet Location Fair Cash collateral balance Other current assets $ 3,777 Commodity contracts Derivative assets $ 28,498 Derivative liabilities $ 20,174 As of December 31, 2020 Assets Liabilities Type of Instrument Balance Sheet Location Fair Balance Sheet Location Fair Cash collateral balance Other current assets $ 520 Commodity contracts Derivative assets $ 17,149 Derivative liabilities $ — The classification and amounts of the Company’s recognized gains for its derivatives not designated as hedging instruments are as follows (in thousands): Realized Gains For the Three Months Ended Type of Instrument Statements of Operations Location 2021 2020 Commodity contracts Cost of goods sold $ 18,158 $ — $ 18,158 $ — Realized Gains For the Six Months Ended Type of Instrument Statements of Operations Location 2021 2020 Commodity contracts Cost of goods sold $ 24,343 $ — $ 24,343 $ — Unrealized Losses For the Three Months Ended Type of Instrument Statements of Operations Location 2021 2020 Commodity contracts Cost of goods sold $ 9,290 $ — $ 9,290 $ — Unrealized Losses For the Six Months Ended Type of Instrument Statements of Operations Location 2021 2020 Commodity contracts Cost of goods sold $ 4,932 $ — $ 4,932 $ —

Debt.

Debt.	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
DEBT.	6. DEBT. Long-term borrowings are summarized as follows (in thousands): June 30, December 31, Kinergy line of credit $ 56,918 $ 32,512 Pekin revolving loan 7,580 20,580 ICP revolving loan 9,384 9,384 Parent notes payable 723 25,533 CARES Act loans 5,973 9,860 80,578 97,869 Less unamortized debt premium — 230 Less unamortized debt financing costs (70 ) (759 ) Less short-term portion (23,660 ) (25,533 ) Long-term debt $ 56,848 $ 71,807 Parent Notes Payable CARES Act Loans Maturities of Long-term Debt December 31: 2021 $ 723 2022 22,937 2023 56,918 $ 80,578 Restrictions

Commitments and Contingencies.

Commitments and Contingencies.	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES.	7. COMMITMENTS AND CONTINGENCIES. Sales Commitments Purchase Commitments Litigation – General

Pension and Retirement Benefit

Pension and Retirement Benefit Plans.	6 Months Ended
	Jun. 30, 2021
Retirement Benefits [Abstract]
PENSION AND RETIREMENT BENEFIT PLANS.	8. PENSION AND RETIREMENT BENEFIT PLANS. The Company sponsors a defined benefit pension plan (the “Retirement Plan”) and a health care and life insurance plan (the “Postretirement Plan”). The Company assumed the Retirement Plan and the Postretirement Plan as part of its acquisition of Aventine Renewable Energy Holdings, Inc. on July 1, 2015. The Retirement Plan is noncontributory, and covers only “grandfathered” unionized employees at the Company’s Pekin, Illinois facility who fulfill minimum age and service requirements. Benefits are based on a prescribed formula based upon the employee’s years of service. The Retirement Plan, which is part of a collective bargaining agreement, covers only union employees hired prior to November 1, 2010. The Company uses a December 31 measurement date for its Retirement Plan. The Company’s funding policy is to make the minimum annual contribution required by applicable regulations. As of December 31, 2020, the Retirement Plan’s accumulated projected benefit obligation was $24.6 million, with a fair value of plan assets of $17.6 million. The underfunded amount of $7.0 million is recorded on the Company’s consolidated balance sheet in other liabilities. For the three months ended June 30, 2021, the Retirement Plan’s net periodic expense was $22,000, comprised of $151,000 in interest cost and $109,000 in service cost, partially offset by $238,000 of expected return on plan assets. For the three months ended June 30, 2020, the Retirement Plan’s net periodic expense was $48,000, comprised of $173,000 in interest cost and $101,000 in service cost, partially offset by $226,000 of expected return on plan assets. For the six months ended June 30, 2021, the Retirement Plan’s net periodic expense was $44,000, comprised of $302,000 in interest cost and $218,000 in service cost, partially offset by $476,000 of expected return on plan assets. For the six months ended June 30, 2020, the Retirement Plan’s net periodic expense was $96,000, comprised of $346,000 in interest cost and $202,000 in service cost, partially offset by $452,000 of expected return on plan assets. The Postretirement Plan provides postretirement medical benefits and life insurance to certain “grandfathered” unionized employees. Employees hired after December 31, 2000 are not eligible to participate in the Postretirement Plan. The Postretirement Plan is contributory, with contributions required at the same rate as active employees. Benefit eligibility under the plan declines at age 65 from a defined benefit to a defined dollar cap based upon years of service. As of December 31, 2020, the Postretirement Plan’s accumulated projected benefit obligation was $5.3 million and is recorded on the Company’s consolidated balance sheet in other liabilities. The Company’s funding policy is to make the minimum annual contribution required by applicable regulations. For the three months ended June 30, 2021, the Postretirement Plan’s net periodic expense was $42,000, comprised of $10,000 of interest cost, $26,000 of service cost and $6,000 of amortization expense. For the three months ended June 30, 2020, the Postretirement Plan’s net periodic expense was $59,000, comprised of $38,000 of interest cost, $14,000 of service cost and $7,000 of amortization expense. For the six months ended June 30, 2021, the Postretirement Plan’s net periodic expense was $84,000, comprised of $20,000 of interest cost, $52,000 of service cost and $12,000 of amortization expense. For the six months ended June 30, 2020, the Postretirement Plan’s net periodic expense was $118,000, comprised of $76,000 of interest cost, $28,000 of service cost and $14,000 of amortization expense.

Fair Value Measurements.

Fair Value Measurements.	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS.	9. FAIR VALUE MEASUREMENTS. The fair value hierarchy prioritizes the inputs used in valuation techniques into three levels, as follows: ● Level 1 – Observable inputs – unadjusted quoted prices in active markets for identical assets and liabilities; ● Level 2 – Observable inputs other than quoted prices included in Level 1 that are observable for the asset or liability through corroboration with market data; and ● Level 3 – Unobservable inputs – includes amounts derived from valuation models where one or more significant inputs are unobservable. For fair value measurements using significant unobservable inputs, a description of the inputs and the information used to develop the inputs is required along with a reconciliation of Level 3 values from the prior reporting period. Pooled separate accounts Long-Lived Assets Held-for-Sale Other Derivative Instruments The following table summarizes recurring and nonrecurring fair value measurements by level at June 30, 2021 (in thousands): Fair Value Level 1 Level 2 Level 3 Assets: Derivative financial instruments $ 28,498 $ 28,498 $ — $ — Long-lived assets held-for-sale 30,199 — — 30,199 $ 58,697 $ 28,498 $ — $ 30,199 Liabilities: Derivative financial instruments $ (20,174 ) $ (20,174 ) $ — $ — $ (20,174 ) $ (20,174 ) $ — $ — The following table summarizes recurring and nonrecurring fair value measurements by level at December 31, 2020 (in thousands): Benefit Plan Fair Percentage Value Level 1 Level 2 Level 3 Allocation Assets: Derivative financial instruments $ 17,149 $ 17,149 $ — $ — Long-lived assets held-for-sale 58,295 — — 58,295 Defined benefit plan assets(1) (pooled separate accounts): Large U.S. Equity(2) 5,470 — 5,470 — 31 % Small/Mid U.S. Equity(3) 2,605 — 2,605 — 15 % International Equity(4) 2,921 — 2,921 — 17 % Fixed Income(5) 6,592 — 6,592 — 37 % $ 93,032 $ 17,149 $ 17,588 $ 58,295 Liabilities: $ — $ — $ — $ — (1) Included in other assets in the consolidated balance sheets. (2) This category includes investments in funds comprised of equity securities of large U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund. (3) This category includes investments in funds comprised of equity securities of small- and medium-sized U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund. (4) This category includes investments in funds comprised of equity securities of foreign companies including emerging markets. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund. (5) This category includes investments in funds comprised of U.S. and foreign investment-grade fixed income securities, high-yield fixed income securities that are rated below investment-grade, U.S. treasury securities, mortgage-backed securities, and other asset-backed securities. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.

Earnings Per Share.

Earnings Per Share.	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
EARNINGS PER SHARE.	10. EARNINGS PER SHARE. The following tables compute basic and diluted earnings per share (in thousands, except per share data): Three Months Ended June 30, 2021 Income Shares Per-Share 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 Shares Per-Share 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 Shares Per-Share 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 Shares Per-Share 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 ) There were an additional aggregate potentially dilutive weighted-average shares of 964,000 from convertible securities outstanding for the three and six months ended June 30, 2021 and 2020. These securities were not considered in calculating diluted net income (loss) per share for the three and six months ended June 30, 2021 and 2020, as their effect would have been anti-dilutive.

Parent Company Financials.

Parent Company Financials.	6 Months Ended
	Jun. 30, 2021
Condensed Financial Information Disclosure [Abstract]
PARENT COMPANY FINANCIALS.	11. PARENT COMPANY FINANCIALS. Restricted Net Assets Parent company financial statements for the periods covered in this report are set forth below (in thousands): June 30, December 31, ASSETS Current Assets: Cash and cash equivalents $ 15,128 $ 25,632 Receivables from subsidiaries 13,460 15,548 Other current assets 2,588 1,836 Total current assets 31,176 43,016 Property and equipment, net 108 142 Other Assets: Investments in subsidiaries 264,645 246,518 Alto West, LLC receivable 27,592 42,649 Right of use operating lease assets, net 2,844 2,985 Other assets 796 1,088 Total other assets 295,877 293,240 Total Assets $ 327,161 $ 336,398 Current Liabilities: Accounts payable and accrued liabilities $ 5,439 $ 2,001 Accrued Alto Op Co. purchase 3,829 3,829 Current portion of long-term debt 6,696 25,533 Other current liabilities 329 473 Total current liabilities 16,293 31,836 Long-term debt, net of current portion — 5,564 Other liabilities 2,849 2,763 Total Liabilities 19,142 40,163 Stockholders’ Equity: Preferred stock 1 1 Common and non-voting common stock 73 72 Additional paid-in capital 1,035,980 1,036,638 Accumulated other comprehensive loss (3,878 ) (3,878 ) Accumulated deficit (724,157 ) (736,598 ) Total Alto Ingredients, Inc. stockholders’ equity 308,019 296,235 Total Liabilities and Stockholders’ Equity $ 327,161 $ 336,398 Three Months Ended Six Months Ended 2021 2020 2021 2020 Management fees from subsidiaries $ 2,486 $ 2,873 $ 5,012 $ 6,126 Selling, general and administrative expenses 4,393 4,308 9,044 9,685 Income (loss) from operations (1,907 ) (1,435 ) (4,032 ) (3,559 ) Fair value adjustments — (1,314 ) — (641 ) Interest expense, net (704 ) (1,721 ) (1,731 ) (3,297 ) Other income (expense) 410 (140 ) 1,218 (162 ) Loss before benefit for income taxes (2,201 ) (4,610 ) (4,545 ) (7,659 ) Benefit for income taxes — — — — Net loss (2,201 ) (4,610 ) (4,545 ) (7,659 ) Equity in income (losses) of subsidiaries 10,591 19,574 17,613 (2,477 ) Net income (loss) attributed to Alto Ingredients, Inc. $ 8,390 $ 14,964 $ 13,068 $ (10,136 ) For the Six Months Ended 2021 2020 Operating Activities: Net income (loss) $ 13,068 $ (10,136 ) Adjustments to reconcile net income (loss) to cash used in operating activities: Equity in (income) losses of subsidiaries (17,613 ) 2,477 Fair value adjustments — (641 ) Depreciation 33 67 Amortization of debt (premiums) discounts 409 (115 ) Changes in operating assets and liabilities: Accounts receivable 2,088 (1,207 ) Other assets (319 ) 714 Accounts payable and accrued expenses (2,416 ) — Accounts payable with subsidiaries 37 475 Net cash used in operating activities (4,713 ) (8,366 ) Investing Activities: Additions to property and equipment — — Net cash used in investing activities — — Financing Activities: Proceeds from issuances of common stock 462 282 Proceeds from plant receivables 15,057 5,813 Proceeds from long-term debt — 5,973 Payments on senior notes (24,810 ) — Dividend from subsidiary 3,500 — Net cash provided by (used in) financing activities (5,791 ) 12,068 Net change in cash and cash equivalents (10,504 ) 3,702 Cash and cash equivalents at beginning of period 25,632 4,985 Cash and cash equivalents at end of period $ 15,128 $ 8,687

Accounting Policies, by Policy

Accounting Policies, by Policy (Policies) - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020
Accounting Policies [Abstract]
Organization and Business		Organization and Business The Company is a leading producer and marketer of specialty alcohols and essential ingredients. The Company also produces and markets fuel-grade ethanol. The Company’s production facilities in Pekin, Illinois are located in the heart of the Corn Belt, benefit from low-cost and abundant feedstock and allow for access to many additional domestic markets. In addition, the Company’s ability to load unit trains and barges from these facilities allows for greater access to international markets. The Company’s three production facilities in California, Oregon and Idaho, located in close proximity to both feed and fuel-grade ethanol customers, enjoy unique advantages in efficiency, logistics and product pricing. The Company has a combined production capacity of 410 million gallons per year, markets, on an annualized basis, over 500 million gallons of alcohols, and produces, on an annualized basis, nearly 1.5 million tons of essential ingredients on a dry matter basis, such as dried yeast, corn gluten meal, corn gluten feed, and distillers grains and liquid feed used in commercial animal feed and pet foods. The Company focuses on four key markets: Health, Home & Beauty Food & Beverage Essential Ingredients Renewable Fuels As of June 30, 2021, the Company was operating at approximately 71% of its 410 million gallon annual production capacity. As market conditions change, the Company may increase, decrease or idle production at one or more operating facilities or resume operations at any idled facility.
Basis of Presentation		Basis of Presentation – Interim Financial Statements
Accounts Receivable and Allowance for Doubtful Accounts		Accounts Receivable and Allowance for Doubtful Accounts The Company maintains an allowance for doubtful accounts for balances that appear to have specific collection issues. The collection process is based on the age of the invoice and requires attempted contacts with the customer at specified intervals. If, after a specified number of days, the Company has been unsuccessful in its collection efforts, a bad debt allowance is recorded for the balance in question. Delinquent accounts receivable are charged against the allowance for doubtful accounts once uncollectibility has been determined. The factors considered in reaching this determination are the apparent financial condition of the customer and the Company’s success in contacting and negotiating with the customer. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of ability to make payments, additional allowances may be required. Of the accounts receivable balance, approximately $61,501,000 and $35,839,000 at June 30, 2021 and December 31, 2020, respectively, were used as collateral under Kinergy’s operating line of credit. The allowance for doubtful accounts was $363,000 and $260,000 as of June 30, 2021 and December 31, 2020, respectively. The Company recorded a bad debt expense of $52,000 and a bad debt recovery of $18,000 for the three months ended June 30, 2021 and 2020, respectively. The Company recorded a bad debt expense of $143,000 and $1,000 for the six months ended June 30, 2021 and 2020, respectively. The Company does not have any off-balance sheet credit exposure related to its customers.
Financial Instruments		Financial Instruments
Estimates and Assumptions		Estimates and Assumptions
Potentially dilutive shares from convertible securities outstanding	964,000		964,000

Assets and Liabilities Held-F_2

Assets and Liabilities Held-For-Sale. (Tables)	6 Months Ended
	Jun. 30, 2021
Business Combinations [Abstract]
Schedule of assets and liabilities as held-for-sale	Stockton Canton Property and equipment, net $ 19,535 $ 1,000 Right of use operating lease assets, net 9,664 — Assets held-for-sale $ 29,199 $ 1,000 Stockton Canton Liabilities held-for-sale – operating leases $ 10,478 $ — Stockton Madera Property and equipment, net $ 19,535 $ 29,013 Right of use operating lease assets, net 9,747 — Assets held-for-sale $ 29,282 $ 29,013 Stockton Madera Operating lease obligations $ 10,435 $ — Assessment financing — 9,107 Liabilities held-for-sale $ 10,435 $ 9,107

Segments. (Tables)

Segments. (Tables)	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Schedule of financial data for operating segments	Three Months Ended Six Months Ended 2021 2020 2021 2020 Net Sales Marketing and distribution: Alcohol sales, gross $ 86,299 $ 71,117 $ 143,309 $ 128,623 Alcohol sales, net 532 307 984 736 Intersegment sales 2,618 1,838 4,862 6,153 Total marketing and distribution sales 89,449 73,262 149,155 135,512 Pekin Campus production, recorded as gross: Alcohol sales $ 132,296 $ 94,538 $ 227,380 $ 178,669 Essential ingredient sales 49,578 33,633 94,655 73,504 Intersegment sales 316 263 628 680 Total Pekin Campus sales 182,190 128,434 322,663 252,853 Other production, recorded as gross: Alcohol sales $ 22,153 $ 9,796 $ 38,121 $ 109,025 Essential ingredient sales 7,252 2,683 12,395 32,921 Intersegment sales 332 410 637 701 Total Other production sales 29,737 12,889 51,153 142,647 Intersegment eliminations (3,266 ) (2,511 ) (6,127 ) (7,534 ) Net sales as reported $ 298,110 $ 212,074 $ 516,844 $ 523,478 Cost of goods sold: Marketing and distribution $ 85,746 $ 69,101 $ 139,705 $ 126,240 Pekin Campus production 171,547 95,070 299,250 221,840 Other production 27,325 18,354 51,442 160,663 Intersegment eliminations (1,741 ) (1,633 ) (2,623 ) (3,557 ) Cost of goods sold as reported $ 282,877 $ 180,892 $ 487,774 $ 505,186 Income (loss) before benefit for income taxes: Marketing and distribution $ 1,678 $ 2,043 $ 5,411 $ 4,286 Pekin Campus production 10,726 27,459 20,736 19,280 Other production (1,666 ) (10,252 ) (7,609 ) (33,816 ) Corporate activities (2,348 ) (4,396 ) (5,470 ) (2,052 ) $ 8,390 $ 14,854 $ 13,068 $ (12,302 ) Depreciation: Pekin Campus production $ 4,326 $ 4,371 $ 8,671 $ 8,757 Other production 1,468 3,697 2,966 9,982 Corporate activities 17 33 33 67 $ 5,811 $ 8,101 $ 11,670 $ 18,806 Interest expense: Marketing and distribution $ 222 $ 313 $ 426 $ 940 Pekin Campus production 73 1,594 591 3,679 Other production 46 29 182 60 Corporate activities 704 2,711 1,731 5,275 $ 1,045 $ 4,647 $ 2,930 $ 9,954
Schedule of assets by operating segments	June 30, December 31, Total assets: Marketing and distribution $ 140,204 $ 89,337 Pekin Campus production 254,206 234,439 Other production 83,330 102,409 Corporate assets 21,464 50,633 $ 499,204 $ 476,818

Inventories. (Tables)

Inventories. (Tables)	6 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Schedule of balances consisted inventory	June 30, December 31, Finished goods $ 40,497 $ 25,154 Work in progress 5,701 4,333 Raw materials 10,788 7,074 Other 1,265 1,364 Total $ 58,251 $ 37,925

Derivatives. (Tables)

Derivatives. (Tables)	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of derivatives not designated as hedging instruments	As of June 30, 2021 Assets Liabilities Type of Instrument Balance Sheet Location Fair Balance Sheet Location Fair Cash collateral balance Other current assets $ 3,777 Commodity contracts Derivative assets $ 28,498 Derivative liabilities $ 20,174 As of December 31, 2020 Assets Liabilities Type of Instrument Balance Sheet Location Fair Balance Sheet Location Fair Cash collateral balance Other current assets $ 520 Commodity contracts Derivative assets $ 17,149 Derivative liabilities $ —
Schedule of recognized gains (losses) for derivatives	Realized Gains For the Three Months Ended Type of Instrument Statements of Operations Location 2021 2020 Commodity contracts Cost of goods sold $ 18,158 $ — $ 18,158 $ — Realized Gains For the Six Months Ended Type of Instrument Statements of Operations Location 2021 2020 Commodity contracts Cost of goods sold $ 24,343 $ — $ 24,343 $ — Unrealized Losses For the Three Months Ended Type of Instrument Statements of Operations Location 2021 2020 Commodity contracts Cost of goods sold $ 9,290 $ — $ 9,290 $ — Unrealized Losses For the Six Months Ended Type of Instrument Statements of Operations Location 2021 2020 Commodity contracts Cost of goods sold $ 4,932 $ — $ 4,932 $ —

Debt. (Tables)

Debt. (Tables)	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Schedule of long term debt	June 30, December 31, Kinergy line of credit $ 56,918 $ 32,512 Pekin revolving loan 7,580 20,580 ICP revolving loan 9,384 9,384 Parent notes payable 723 25,533 CARES Act loans 5,973 9,860 80,578 97,869 Less unamortized debt premium — 230 Less unamortized debt financing costs (70 ) (759 ) Less short-term portion (23,660 ) (25,533 ) Long-term debt $ 56,848 $ 71,807
Schedule of maturities of long-term debt	December 31: 2021 $ 723 2022 22,937 2023 56,918 $ 80,578

Fair Value Measurements. (Table

Fair Value Measurements. (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of recurring and nonrecurring fair value measurements	Fair Value Level 1 Level 2 Level 3 Assets: Derivative financial instruments $ 28,498 $ 28,498 $ — $ — Long-lived assets held-for-sale 30,199 — — 30,199 $ 58,697 $ 28,498 $ — $ 30,199 Liabilities: Derivative financial instruments $ (20,174 ) $ (20,174 ) $ — $ — $ (20,174 ) $ (20,174 ) $ — $ — Benefit Plan Fair Percentage Value Level 1 Level 2 Level 3 Allocation Assets: Derivative financial instruments $ 17,149 $ 17,149 $ — $ — Long-lived assets held-for-sale 58,295 — — 58,295 Defined benefit plan assets(1) (pooled separate accounts): Large U.S. Equity(2) 5,470 — 5,470 — 31 % Small/Mid U.S. Equity(3) 2,605 — 2,605 — 15 % International Equity(4) 2,921 — 2,921 — 17 % Fixed Income(5) 6,592 — 6,592 — 37 % $ 93,032 $ 17,149 $ 17,588 $ 58,295 Liabilities: $ — $ — $ — $ —

Earnings Per Share. (Tables)

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 Shares Per-Share 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 Shares Per-Share 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 Shares Per-Share 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 Shares Per-Share 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 )

Parent Company Financials. (Tab

Parent Company Financials. (Tables)	6 Months Ended
	Jun. 30, 2021
Condensed Financial Information Disclosure [Abstract]
Schedule of parent company financial statements	June 30, December 31, ASSETS Current Assets: Cash and cash equivalents $ 15,128 $ 25,632 Receivables from subsidiaries 13,460 15,548 Other current assets 2,588 1,836 Total current assets 31,176 43,016 Property and equipment, net 108 142 Other Assets: Investments in subsidiaries 264,645 246,518 Alto West, LLC receivable 27,592 42,649 Right of use operating lease assets, net 2,844 2,985 Other assets 796 1,088 Total other assets 295,877 293,240 Total Assets $ 327,161 $ 336,398 Current Liabilities: Accounts payable and accrued liabilities $ 5,439 $ 2,001 Accrued Alto Op Co. purchase 3,829 3,829 Current portion of long-term debt 6,696 25,533 Other current liabilities 329 473 Total current liabilities 16,293 31,836 Long-term debt, net of current portion — 5,564 Other liabilities 2,849 2,763 Total Liabilities 19,142 40,163 Stockholders’ Equity: Preferred stock 1 1 Common and non-voting common stock 73 72 Additional paid-in capital 1,035,980 1,036,638 Accumulated other comprehensive loss (3,878 ) (3,878 ) Accumulated deficit (724,157 ) (736,598 ) Total Alto Ingredients, Inc. stockholders’ equity 308,019 296,235 Total Liabilities and Stockholders’ Equity $ 327,161 $ 336,398
Schedule of statement of operations parent company	Three Months Ended Six Months Ended 2021 2020 2021 2020 Management fees from subsidiaries $ 2,486 $ 2,873 $ 5,012 $ 6,126 Selling, general and administrative expenses 4,393 4,308 9,044 9,685 Income (loss) from operations (1,907 ) (1,435 ) (4,032 ) (3,559 ) Fair value adjustments — (1,314 ) — (641 ) Interest expense, net (704 ) (1,721 ) (1,731 ) (3,297 ) Other income (expense) 410 (140 ) 1,218 (162 ) Loss before benefit for income taxes (2,201 ) (4,610 ) (4,545 ) (7,659 ) Benefit for income taxes — — — — Net loss (2,201 ) (4,610 ) (4,545 ) (7,659 ) Equity in income (losses) of subsidiaries 10,591 19,574 17,613 (2,477 ) Net income (loss) attributed to Alto Ingredients, Inc. $ 8,390 $ 14,964 $ 13,068 $ (10,136 )
Schedule of statement of cash flows parent company	For the Six Months Ended 2021 2020 Operating Activities: Net income (loss) $ 13,068 $ (10,136 ) Adjustments to reconcile net income (loss) to cash used in operating activities: Equity in (income) losses of subsidiaries (17,613 ) 2,477 Fair value adjustments — (641 ) Depreciation 33 67 Amortization of debt (premiums) discounts 409 (115 ) Changes in operating assets and liabilities: Accounts receivable 2,088 (1,207 ) Other assets (319 ) 714 Accounts payable and accrued expenses (2,416 ) — Accounts payable with subsidiaries 37 475 Net cash used in operating activities (4,713 ) (8,366 ) Investing Activities: Additions to property and equipment — — Net cash used in investing activities — — Financing Activities: Proceeds from issuances of common stock 462 282 Proceeds from plant receivables 15,057 5,813 Proceeds from long-term debt — 5,973 Payments on senior notes (24,810 ) — Dividend from subsidiary 3,500 — Net cash provided by (used in) financing activities (5,791 ) 12,068 Net change in cash and cash equivalents (10,504 ) 3,702 Cash and cash equivalents at beginning of period 25,632 4,985 Cash and cash equivalents at end of period $ 15,128 $ 8,687

Organization and Basis of Pre_2

Organization and Basis of Presentation. (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Organization and Basis of Presentation. (Details) [Line Items]
Accounts receivable balance	$ 61,501,000		$ 61,501,000		$ 35,839,000
Allowance for doubtful accounts	363,000		363,000		$ 260,000
Bad debt expense			$ 143,000	$ 1,000
Combined Production Capacity, Description			The Company has a combined production capacity of 410 million gallons per year, markets, on an annualized basis, over 500 million gallons of alcohols, and produces, on an annualized basis, nearly 1.5 million tons of essential ingredients on a dry matter basis, such as dried yeast, corn gluten meal, corn gluten feed, and distillers grains and liquid feed used in commercial animal feed and pet foods.
Operating annual production, Description			the Company was operating at approximately 71% of its 410 million gallon annual production capacity.
Debt [Member]
Organization and Basis of Presentation. (Details) [Line Items]
Bad debt expense	$ 52,000	$ 18,000	$ 143,000	$ 1,000

Assets and Liabilities Held-F_3

Assets and Liabilities Held-For-Sale. (Details) - USD ($)	May 14, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Assets and Liabilities Held-For-Sale. (Details) [Line Items]
Impairment charge						$ 1,200,000
Sale of Madera facility total consideration	$ 28,300,000
Cash	19,500,000
Assumption of liabilities	8,800,000
Net loss	$ 100,000	$ 8,390,000	$ 4,678,000	$ 14,854,000	$ (27,156,000)	13,068,000	$ (12,302,000)
Cash proceeds		1,900,000
Pre-tax loss		8,390,000		14,854,000		13,068,000	(12,302,000)
Stockton [Member]
Assets and Liabilities Held-For-Sale. (Details) [Line Items]
Net loss		400,000		500,000		600,000	22,400,000
Pre-tax loss		1,400,000		1,200,000		2,200,000	3,500,000
Madera [Member]
Assets and Liabilities Held-For-Sale. (Details) [Line Items]
Net loss		100,000		1,000,000		100,000	22,500,000
Pre-tax loss		$ 200,000		$ 1,800,000		$ 1,800,000	$ 3,600,000

Assets and Liabilities Held-F_4

Assets and Liabilities Held-For-Sale. (Details) - Schedule of assets and liabilities as held-for-sale - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Stockton [Member]
Long Lived Assets Held-for-sale [Line Items]
Property and equipment, net	$ 19,535	$ 19,535
Right of use operating lease assets, net	9,664	9,747
Assets held-for-sale	29,199	29,282
Operating lease obligations		10,435
Assessment financing
Liabilities held-for-sale		10,435
Liabilities held-for-sale – operating leases	10,478
Canton [Member]
Long Lived Assets Held-for-sale [Line Items]
Property and equipment, net	1,000
Right of use operating lease assets, net
Assets held-for-sale	1,000
Liabilities held-for-sale – operating leases
Madera [Member]
Long Lived Assets Held-for-sale [Line Items]
Property and equipment, net		29,013
Right of use operating lease assets, net
Assets held-for-sale		29,013
Operating lease obligations
Assessment financing		9,107
Liabilities held-for-sale		$ 9,107

Segments. (Details)

Segments. (Details)	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Number of operating segments	3

Segments. (Details) - Schedule

Segments. (Details) - Schedule of financial data for operating segments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Marketing and distribution:
Net sales as reported	$ 298,110	$ 212,074	$ 516,844	$ 523,478
Cost of goods sold as reported	282,877	180,892	487,774	505,186
Income (loss) before benefit for income taxes	8,390	14,854	13,068	(12,302)
Total [Member]
Marketing and distribution:
Net sales as reported	298,110	212,074	516,844	523,478
Cost of goods sold as reported	282,877	180,892	487,774	505,186
Income (loss) before benefit for income taxes	8,390	14,854	13,068	(12,302)
Depreciation:
Depreciation	5,811	8,101	11,670	18,806
Interest expense:
Interest expense	1,045	4,647	2,930	9,954
Marketing and distribution [Member]
Marketing and distribution:
Cost of goods sold as reported	85,746	69,101	139,705	126,240
Income (loss) before benefit for income taxes	1,678	2,043	5,411	4,286
Interest expense:
Interest expense	222	313	426	940
Marketing and distribution [Member] | Alcohol sales [Member]
Marketing and distribution:
Net sales as reported	86,299	71,117	143,309	128,623
Marketing and distribution [Member] | Alcohol sales, net [Member]
Marketing and distribution:
Net sales as reported	532	307	984	736
Marketing and distribution [Member] | Intersegment sales [Member]
Marketing and distribution:
Net sales as reported	2,618	1,838	4,862	6,153
Marketing and distribution [Member] | Total marketing and distribution sales [Member]
Marketing and distribution:
Net sales as reported	89,449	73,262	149,155	135,512
Pekin Campus production [Member]
Marketing and distribution:
Cost of goods sold as reported	171,547	95,070	299,250	221,840
Income (loss) before benefit for income taxes	10,726	27,459	20,736	19,280
Depreciation:
Depreciation	4,326	4,371	8,671	8,757
Interest expense:
Interest expense	73	1,594	591	3,679
Pekin Campus production [Member] | Alcohol sales [Member]
Marketing and distribution:
Net sales as reported	132,296	94,538	227,380	178,669
Pekin Campus production [Member] | Intersegment sales [Member]
Marketing and distribution:
Net sales as reported	316	263	628	680
Pekin Campus production [Member] | Essential ingredient sales [Member]
Marketing and distribution:
Net sales as reported	49,578	33,633	94,655	73,504
Pekin Campus production [Member] | Total Pekin Campus sales [Member]
Marketing and distribution:
Net sales as reported	182,190	128,434	322,663	252,853
Other production [Member]
Marketing and distribution:
Cost of goods sold as reported	27,325	18,354	51,442	160,663
Income (loss) before benefit for income taxes	(1,666)	(10,252)	(7,609)	(33,816)
Depreciation:
Depreciation	1,468	3,697	2,966	9,982
Interest expense:
Interest expense	46	29	182	60
Other production [Member] | Alcohol sales [Member]
Marketing and distribution:
Net sales as reported	22,153	9,796	38,121	109,025
Other production [Member] | Intersegment sales [Member]
Marketing and distribution:
Net sales as reported	332	410	637	701
Other production [Member] | Essential ingredient sales [Member]
Marketing and distribution:
Net sales as reported	7,252	2,683	12,395	32,921
Other production [Member] | Total Other production sales [Member]
Marketing and distribution:
Net sales as reported	29,737	12,889	51,153	142,647
Intersegment eliminations [Member]
Marketing and distribution:
Net sales as reported	(3,266)	(2,511)	(6,127)	(7,534)
Cost of goods sold as reported	(1,741)	(1,633)	(2,623)	(3,557)
Corporate activities [Member]
Marketing and distribution:
Income (loss) before benefit for income taxes	(2,348)	(4,396)	(5,470)	(2,052)
Depreciation:
Depreciation	17	33	33	67
Interest expense:
Interest expense	$ 704	$ 2,711	$ 1,731	$ 5,275

Segments. (Details) - Schedul_2

Segments. (Details) - Schedule of assets by operating segments - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Total assets:
Total assets	$ 499,204	$ 476,818	[1]
Marketing and distribution [Member]
Total assets:
Total assets	140,204	89,337
Pekin Campus production [Member]
Total assets:
Total assets	254,206	234,439
Other production [Member]
Total assets:
Total assets	83,330	102,409
Corporate assets [Member]
Total assets:
Total assets	$ 21,464	$ 50,633
[1]	Amounts derived from the audited consolidated financial statements for the year ended December 31, 2020.

Inventories. (Details)

Inventories. (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventory net	$ 1,800,000	$ 1,033,000

Inventories. (Details) - Schedu

Inventories. (Details) - Schedule of balances consisted inventory - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule of balances consisted inventory [Abstract]
Finished goods	$ 40,497	$ 25,154
Work in progress	5,701	4,333
Raw materials	10,788	7,074
Other	1,265	1,364
Total	$ 58,251	$ 37,925	[1]
[1]	Amounts derived from the audited consolidated financial statements for the year ended December 31, 2020.

Derivatives. (Details)

Derivatives. (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative [Member]
Derivatives. (Details) [Line Items]
Recognized gains and losses due to change in fair value	$ 8,868,000	$ 0	$ 19,411,000	$ 0

Derivatives. (Details) - Schedu

Derivatives. (Details) - Schedule of derivatives not designated as hedging instruments - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Cash collateral balance [Member]
Derivatives. (Details) - Schedule of derivatives not designated as hedging instruments [Line Items]
Assets, fair value	$ 3,777	$ 520
Commodity contracts [Member]
Derivatives. (Details) - Schedule of derivatives not designated as hedging instruments [Line Items]
Assets, fair value	28,498	17,149
Liabilities, fair value	$ 20,174

Derivatives. (Details) - Sche_2

Derivatives. (Details) - Schedule of recognized gains (losses) for derivatives - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gains	$ 18,158		$ 24,343
Unrealized Losses	9,290		4,932
Non Designated Derivative Instruments [Member] | Cost of goods sold [Member] | Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gains	18,158		24,343
Non Designated Derivative Instruments [Member] | Cost of goods sold [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Losses	$ 9,290		$ 4,932

Debt. (Details)

Debt. (Details) - USD ($) $ in Millions	May 14, 2021	Jun. 30, 2021
Debt [Abstract]
Repayment of principal on notes payable	$ 19.3
Remaining amount of notes payable	$ 0.7
Loan payable		$ 6
Net assets		245.7
Debt [Member]
Debt [Abstract]
Net assets		245.7
Alto Pekin [Member]
Debt [Abstract]
Loan payable		3.9
Loan forgiveness amount		$ 3.9

Debt. (Details) - Schedule of l

Debt. (Details) - Schedule of long term debt - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Term debt	$ 80,578	$ 97,869
Less unamortized debt premium		230
Less unamortized debt financing costs	(70)	(759)
Less short-term portion	(23,660)	(25,533)
Long-term debt	56,848	71,807	[1]
Kinergy line of credit [Member]
Debt Instrument [Line Items]
Term debt	56,918	32,512
Pekin revolving loan [Member]
Debt Instrument [Line Items]
Term debt	7,580	20,580
ICP revolving loan [Member]
Debt Instrument [Line Items]
Term debt	9,384	9,384
Parent notes payable [Member]
Debt Instrument [Line Items]
Term debt	723	25,533
CARES Act loans [Member]
Debt Instrument [Line Items]
Term debt	$ 5,973	$ 9,860
[1]	Amounts derived from the audited consolidated financial statements for the year ended December 31, 2020.

Debt. (Details) - Schedule of m

Debt. (Details) - Schedule of maturities of long-term debt $ in Thousands	Jun. 30, 2021USD ($)
Schedule of maturities of long-term debt [Abstract]
2021	$ 723
2022	22,937
2023	56,918
Total debt	$ 80,578

Commitments and Contingencies.

Commitments and Contingencies. (Details)	6 Months Ended
	Jun. 30, 2021USD ($)
Commitments and Contingencies. (Details) [Line Items]
Indexed price purchase contracts gallons	96,399,000
Open fixed-price sales contracts valued	$ 11,061,000
Ethanol Sales Contracts [Member]
Commitments and Contingencies. (Details) [Line Items]
Open fixed-price sales contracts valued	223,575,000
Co-products Sales Contracts [Member]
Commitments and Contingencies. (Details) [Line Items]
open indexed-price sales contracts tons	$ 117,000
Ethanol Purchase Contracts [Member] | Suppliers [Member]
Commitments and Contingencies. (Details) [Line Items]
Indexed price purchase contracts gallons	17,706,000
Ethanol Purchase Contracts [Member] | Fuel-grade from suppliers [Member]
Commitments and Contingencies. (Details) [Line Items]
Fixed-price purchase contracts value	$ 39,086,000
Ethanol Purchase Contracts [Member] | Corn from suppliers [Member]
Commitments and Contingencies. (Details) [Line Items]
Fixed-price purchase contracts value	$ 77,375,000

Pension and Retirement Benefi_2

Pension and Retirement Benefit Plans. (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Retirement Plan [Member]
Pension and Retirement Benefit Plans. (Details) [Line Items]
Accumulated projected benefit obligation					$ 24,600
Fair value of plan assets					17,600
Underfunded amount					7,000
Net periodic expense	$ 22,000	$ 48,000	$ 44,000	$ 96,000
Interest cost	151,000	173,000	302,000	346,000
Service cost	109,000	101,000	218,000	202,000
Expected return on plan assets	238,000	226,000	476,000	452,000
Post Retirement Plan [Member]
Pension and Retirement Benefit Plans. (Details) [Line Items]
Accumulated projected benefit obligation					$ 5,300
Net periodic expense	42,000	59,000	84,000	118,000
Interest cost	10,000	38,000	20,000	76,000
Service cost	26,000	14,000	52,000	28,000
Amortization expense	$ 6,000	$ 7,000	$ 12,000	$ 14,000

Fair Value Measurements. (Detai

Fair Value Measurements. (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Property and equipment held-for-sale at fair value	$ 20,535,000	$ 48,548,000

Fair Value Measurements. (Det_2

Fair Value Measurements. (Details) - Schedule of recurring and nonrecurring fair value measurements - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Assets:
Asset		$ 58,697	$ 93,032
Liabilities:
Liabilities		(20,174)
Derivative Financial Instrument [Member]
Assets:
Asset		28,498	$ 17,149
Benefit Plan Percentage Allocation
Liabilities:
Liabilities		(20,174)
Long-lived assets held-for-sale [Member]
Assets:
Asset		30,199	$ 58,295
Benefit Plan Percentage Allocation
Defined Benefit Plan Assets [Member]
Assets:
Asset	[1]
Benefit Plan Percentage Allocation	[1]
Large U,S Equity [Member]
Assets:
Asset	[2]		$ 5,470
Benefit Plan Percentage Allocation	[2]		31.00%
Small/Mid U.S Equity [Member]
Assets:
Asset	[3]		$ 2,605
Benefit Plan Percentage Allocation	[3]		15.00%
International Equity [Member]
Assets:
Asset	[4]		$ 2,921
Benefit Plan Percentage Allocation	[4]		17.00%
Fixed Income [Member]
Assets:
Asset	[5]		$ 6,592
Benefit Plan Percentage Allocation	[5]		37.00%
Level 1 [Member]
Assets:
Asset		28,498	$ 17,149
Liabilities:
Liabilities		(20,174)
Level 1 [Member] | Derivative Financial Instrument [Member]
Assets:
Asset		28,498	17,149
Liabilities:
Liabilities		(20,174)
Level 1 [Member] | Long-lived assets held-for-sale [Member]
Assets:
Asset				[1]
Level 1 [Member] | Defined Benefit Plan Assets [Member]
Assets:
Asset	[1]
Level 1 [Member] | Large U,S Equity [Member]
Assets:
Asset	[2]
Level 1 [Member] | Small/Mid U.S Equity [Member]
Assets:
Asset	[3]
Level 1 [Member] | International Equity [Member]
Assets:
Asset	[4]
Level 1 [Member] | Fixed Income [Member]
Assets:
Asset	[5]
Level 2 [Member]
Assets:
Asset			17,588
Liabilities:
Liabilities
Level 2 [Member] | Derivative Financial Instrument [Member]
Assets:
Asset
Liabilities:
Liabilities
Level 2 [Member] | Long-lived assets held-for-sale [Member]
Assets:
Asset				[1]
Level 2 [Member] | Defined Benefit Plan Assets [Member]
Assets:
Asset	[1]
Level 2 [Member] | Large U,S Equity [Member]
Assets:
Asset	[2]		5,470
Level 2 [Member] | Small/Mid U.S Equity [Member]
Assets:
Asset	[3]		2,605
Level 2 [Member] | International Equity [Member]
Assets:
Asset	[4]		2,921
Level 2 [Member] | Fixed Income [Member]
Assets:
Asset	[5]		6,592
Level 3 [Member]
Assets:
Asset		30,199	58,295
Liabilities:
Liabilities
Level 3 [Member] | Derivative Financial Instrument [Member]
Assets:
Asset
Level 3 [Member] | Long-lived assets held-for-sale [Member]
Assets:
Asset		$ 30,199	58,295	[1]
Level 3 [Member] | Defined Benefit Plan Assets [Member]
Assets:
Asset	[1]
Level 3 [Member] | Large U,S Equity [Member]
Assets:
Asset	[2]
Level 3 [Member] | Small/Mid U.S Equity [Member]
Assets:
Asset	[3]
Level 3 [Member] | International Equity [Member]
Assets:
Asset	[4]
Level 3 [Member] | Fixed Income [Member]
Assets:
Asset	[5]
[1]	Included in other assets in the consolidated balance sheets.
[2]	This category includes investments in funds comprised of equity securities of large U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[3]	This category includes investments in funds comprised of equity securities of small- and medium-sized U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[4]	This category includes investments in funds comprised of equity securities of foreign companies including emerging markets. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[5]	This category includes investments in funds comprised of U.S. and foreign investment-grade fixed income securities, high-yield fixed income securities that are rated below investment-grade, U.S. treasury securities, mortgage-backed securities, and other asset-backed securities. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.

Earnings Per Share. (Details)

Earnings Per Share. (Details) - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Potentially dilutive shares from convertible securities outstanding	964,000	964,000

Earnings Per Share. (Details) -

Earnings Per Share. (Details) - Schedule of computation of basic and diluted earnings per share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Schedule of computation of basic and diluted earnings per share [Abstract]
Net income attributed to Alto Ingredients, Inc.	$ 8,390		$ 14,964		$ 13,068	$ (10,136)
Less: Preferred stock dividends	(315)	$ (312)	(315)	$ (315)	(627)	(630)
Basic income per share:
Income available to common stockholders	$ 8,075		$ 14,649		$ 12,441	(10,766)
Income available to common stockholders (in Shares)	71,260		54,498		70,808
Income available to common stockholders (in Dollars per share)	$ 0.11		$ 0.27		$ 0.18
Add: Dilutive instruments	$ 669				$ 1,153
Diluted income per share:
Income available to common stockholders	$ 8,075		$ 14,649		$ 12,441	$ (10,766)
Income available to common stockholders (in Shares)	71,929				71,961	54,163
Income available to common stockholders (in Dollars per share)	$ 0.11				$ 0.17	$ (0.20)

Parent Company Financials. (Det

Parent Company Financials. (Details) $ in Millions	Jun. 30, 2021USD ($)
Condensed Financial Information Disclosure [Abstract]
Net asset	$ 245.7

Parent Company Financials. (D_2

Parent Company Financials. (Details) - Schedule of parent company financial statements - Parent Company [Member] - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 15,128	$ 25,632	$ 8,687	$ 4,985
Receivables from subsidiaries	13,460	15,548
Other current assets	2,588	1,836
Total current assets	31,176	43,016
Property and equipment, net	108	142
Other Assets:
Investments in subsidiaries	264,645	246,518
Alto West, LLC receivable	27,592	42,649
Right of use operating lease assets, net	2,844	2,985
Other assets	796	1,088
Total other assets	295,877	293,240
Total Assets	327,161	336,398
Current Liabilities:
Accounts payable and accrued liabilities	5,439	2,001
Accrued Alto Op Co. purchase	3,829	3,829
Current portion of long-term debt	6,696	25,533
Other current liabilities	329	473
Total current liabilities	16,293	31,836
Long-term debt, net of current portion		5,564
Other liabilities	2,849	2,763
Total Liabilities	19,142	40,163
Stockholders’ Equity:
Preferred stock	1	1
Common and non-voting common stock	73	72
Additional paid-in capital	1,035,980	1,036,638
Accumulated other comprehensive loss	(3,878)	(3,878)
Accumulated deficit	(724,157)	(736,598)
Total Alto Ingredients, Inc. stockholders’ equity	308,019	296,235
Total Liabilities and Stockholders’ Equity	$ 327,161	$ 336,398

Parent Company Financials. (D_3

Parent Company Financials. (Details) - Schedule of statement of operations parent company - Parent Company [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Parent Company Financials. (Details) - Schedule of statement of operations parent company [Line Items]
Management fees from subsidiaries	$ 2,486	$ 2,873	$ 5,012	$ 6,126
Selling, general and administrative expenses	4,393	4,308	9,044	9,685
Income (loss) from operations	(1,907)	(1,435)	(4,032)	(3,559)
Fair value adjustments		(1,314)		(641)
Interest expense, net	(704)	(1,721)	(1,731)	(3,297)
Other income (expense)	410	(140)	1,218	(162)
Loss before benefit for income taxes	(2,201)	(4,610)	(4,545)	(7,659)
Benefit for income taxes
Net loss	(2,201)	(4,610)	(4,545)	(7,659)
Equity in income (losses) of subsidiaries	10,591	19,574	17,613	(2,477)
Net income (loss) attributed to Alto Ingredients, Inc.	$ 8,390	$ 14,964	$ 13,068	$ (10,136)

Parent Company Financials. (D_4

Parent Company Financials. (Details) - Schedule of statement of cash flows parent company - Parent Company [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities:
Consolidated net income (loss)	$ 13,068	$ (10,136)
Adjustments to reconcile net income (loss) to cash used in operating activities:
Equity in (income) losses of subsidiaries	(17,613)	2,477
Fair value adjustments		(641)
Depreciation	33	67
Amortization of debt (premiums) discounts	409	(115)
Changes in operating assets and liabilities:
Accounts receivable	2,088	(1,207)
Other assets	(319)	714
Accounts payable and accrued expenses	(2,416)
Accounts payable with subsidiaries	37	475
Net cash used in operating activities	(4,713)	(8,366)
Investing Activities:
Additions to property and equipment
Net cash used in investing activities
Financing Activities:
Proceeds from issuance of common stock	462	282
Proceeds from plant receivables	15,057	5,813
Proceeds from long-term debt		5,973
Payments on senior notes	(24,810)
Dividend from subsidiary	3,500
Net cash provided by (used in) financing activities	(5,791)	12,068
Net change in cash and cash equivalents	(10,504)	3,702
Cash and cash equivalents at beginning of period	25,632	4,985
Cash and cash equivalents at end of period	$ 15,128	$ 8,687