FAIR VALUE - HIERARCHY (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Liabilities:
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Liabilities and Equity
Fair Value, Measurements, Recurring
Assets:
Other	$ 2,603	$ 2,641
Total assets at fair value	29,984	35,105
Liabilities:
Total liabilities at fair value	19,594	24,112
Fair Value, Measurements, Recurring | Money market funds
Assets:
Assets	21,631	145
Fair Value, Measurements, Recurring | Physical commodity contracts
Assets:
Assets	2,533	7,054
Liabilities:
Liabilities	17,620	21,115
Fair Value, Measurements, Recurring | Financial commodity contracts
Assets:
Assets	3,217	25,265
Liabilities:
Liabilities	1,974	2,997
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets, (Level 1)
Assets:
Other	2,603	2,641
Total assets at fair value	27,451	28,051
Liabilities:
Total liabilities at fair value	1,974	2,997
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets, (Level 1) | Money market funds
Assets:
Assets	21,631	145
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets, (Level 1) | Physical commodity contracts
Assets:
Assets	0	0
Liabilities:
Liabilities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets, (Level 1) | Financial commodity contracts
Assets:
Assets	3,217	25,265
Liabilities:
Liabilities	1,974	2,997
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets:
Other	0	0
Total assets at fair value	2,533	7,054
Liabilities:
Total liabilities at fair value	17,620	21,115
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Money market funds
Assets:
Assets	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Physical commodity contracts
Assets:
Assets	2,533	7,054
Liabilities:
Liabilities	17,620	21,115
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Financial commodity contracts
Assets:
Assets	0	0
Liabilities:
Liabilities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets:
Other	0	0
Total assets at fair value	0	0
Liabilities:
Total liabilities at fair value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Money market funds
Assets:
Assets	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Physical commodity contracts
Assets:
Assets	0	0
Liabilities:
Liabilities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Financial commodity contracts
Assets:
Assets	0	0
Liabilities:
Liabilities	$ 0	$ 0