Operating Leases - Maturity Analysis of Undiscounted Cash Flows of Operating Lease Liabilities (Details)	Jun. 30, 2026 USD ($)
Lessee, Lease, Description [Line Items]
Twelve-month periods ended September 30, 2021	$ 11,243,556
Twelve-month periods ended September 30, 2022	10,694,055
Twelve-month periods ended September 30, 2023	10,677,630
Twelve-month periods ended September 30, 2024	10,313,408
Twelve-month periods ended September 30, 2025	9,935,542
Thereafter	46,111,228
Total lease payments	98,975,419
Less amount of lease payments representing interest	(20,086,410)
Total present value of lease payments	78,889,009
Other
Lessee, Lease, Description [Line Items]
Twelve-month periods ended September 30, 2021	501,539
Twelve-month periods ended September 30, 2022	497,438
Twelve-month periods ended September 30, 2023	481,013
Twelve-month periods ended September 30, 2024	416,041
Twelve-month periods ended September 30, 2025	337,425
Thereafter	372,848
Total lease payments	2,606,304
Less amount of lease payments representing interest	(375,956)
Total present value of lease payments	2,230,348
Railroad cars
Lessee, Lease, Description [Line Items]
Twelve-month periods ended September 30, 2021	10,742,017
Twelve-month periods ended September 30, 2022	10,196,617
Twelve-month periods ended September 30, 2023	10,196,617
Twelve-month periods ended September 30, 2024	9,897,367
Twelve-month periods ended September 30, 2025	9,598,117
Thereafter	45,738,380
Total lease payments	96,369,115
Less amount of lease payments representing interest	(19,710,454)
Total present value of lease payments	$ 76,658,661

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.

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