XML 82 R68.htm IDEA: XBRL DOCUMENT v3.22.4

Note 11 - Segment Information (Details Textual) gal in Millions	12 Months Ended
	Dec. 31, 2022 gal	Dec. 31, 2021
Number of Reportable Segments	3
California Ethanol [Member]
GallonPerYear (Gallon)	65
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Ethanol Sales [Member]
Number of Major Customers	1	2
Concentration Risk, Percentage	73.00%
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Ethanol Sales [Member] | Customer One [Member]
Concentration Risk, Percentage		52.00%
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Ethanol Sales [Member] | Customer Two [Member]
Concentration Risk, Percentage		24.00%
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Wet Distillers Grain and Corn Oil Sales [Member]
Number of Major Customers	1	1
Concentration Risk, Percentage	26.00%
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Wet Distillers Grain and Corn Oil Sales [Member] | Customer One [Member]
Concentration Risk, Percentage		23.00%
India Biodiesel [Member]
GallonPerYear (Gallon)	50
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Biodiesel Sales [Member]
Number of Major Customers	3	1
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Biodiesel Sales [Member] | Customer One [Member]
Concentration Risk, Percentage	48.00%	66.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Biodiesel Sales [Member] | Customer Two [Member]
Concentration Risk, Percentage	29.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Biodiesel Sales [Member] | Customer Three [Member]
Concentration Risk, Percentage	12.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Refined Glycerin Sales [Member]
Number of Major Customers		1
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Refined Glycerin Sales [Member] | Customer One [Member]
Concentration Risk, Percentage		16.00%

X

- Definition

Represents amount of gallon per year.

+ References

No definition available.

+ Details

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Namespace Prefix:	amtx_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents number of major customers.

+ References

No definition available.

+ Details

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Namespace Prefix:	amtx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
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-Paragraph 18
-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 825
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-Section 50
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-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8672-108599

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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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X

- Details

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- Details

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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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- Details

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- Details

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Data Type:	na
Balance Type:
Period Type:

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- Details

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- Details

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- Details

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- Details

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