Operating Leases - Maturity Analysis of Undiscounted Cash Flows of Operating Lease Liabilities (Details)	Mar. 31, 2026 USD ($)
Lessee, Lease, Description [Line Items]
Twelve-month periods ended September 30, 2021	$ 11,455,568
Twelve-month periods ended September 30, 2022	10,694,550
Twelve-month periods ended September 30, 2023	10,670,786
Twelve-month periods ended September 30, 2024	10,473,731
Twelve-month periods ended September 30, 2025	9,966,761
Thereafter	48,046,232
Total lease payments	101,307,628
Less amount of lease payments representing interest	(20,456,058)
Total present value of lease payments	80,851,570
Other
Lessee, Lease, Description [Line Items]
Twelve-month periods ended September 30, 2021	475,482
Twelve-month periods ended September 30, 2022	473,189
Twelve-month periods ended September 30, 2023	458,115
Twelve-month periods ended September 30, 2024	410,685
Twelve-month periods ended September 30, 2025	352,590
Thereafter	454,140
Total lease payments	2,624,201
Less amount of lease payments representing interest	(397,629)
Total present value of lease payments	2,226,572
Railroad cars
Lessee, Lease, Description [Line Items]
Twelve-month periods ended September 30, 2021	10,980,086
Twelve-month periods ended September 30, 2022	10,221,361
Twelve-month periods ended September 30, 2023	10,212,671
Twelve-month periods ended September 30, 2024	10,063,046
Twelve-month periods ended September 30, 2025	9,614,171
Thereafter	47,592,092
Total lease payments	98,683,427
Less amount of lease payments representing interest	(20,058,429)
Total present value of lease payments	$ 78,624,998

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 3
-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-URI https://asc.fasb.org/1943274/2147478964/842-20-50-6

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