Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Uncertainties and Certain Significant Accounting Estimates (Details)	1 Months Ended	6 Months Ended	7 Months Ended
	Mar. 31, 2020 plant	Sep. 30, 2020 USD ($) ethanol_plant plant	Oct. 28, 2020 plant	Sep. 30, 2020 USD ($) ethanol_plant plant
Uncertainties and Certain Significant Accounting Estimates (Textual)
Number of ethanol plants temporarily idled	8
Number of ethanol plants with temporarily reduced production	6
Number of idled ethanol plants restarted due to partial recovery in demand		5
Number of ethanol plants \| ethanol_plant		14		14
Number of ethanol plants with reduced estimated useful life				1
Number of ethanol plants evaluated for potential impairment				5
Goodwill \| $		$ 260,000,000		$ 260,000,000
Impairment of goodwill \| $				$ 0
Subsequent Event [Member]
Uncertainties and Certain Significant Accounting Estimates (Textual)
Number of ethanol plants returned to full production			11
Number of ethanol plants			14