Fair value measurements (Tables)

12 Months Ended

Jul. 31, 2026

Fair value measurements

Schedule of financial assets and liabilities measured at fair value on a recurring basis


		Asset (Liability)
		Quoted Prices in Active
		Markets for Identical			Significant Other
		Assets and Liabilities			Observable Inputs			Unobservable Inputs
		(Level 1)			(Level 2)			(Level 3)			Total
July 31, 2026:
Assets:
Derivative financial instruments:
Commodity derivatives		$	—		$	5,370		$	—		$	5,370
Liabilities:
Derivative financial instruments:
Commodity derivatives		$	—		$	(9,468)		$	—		$	(9,468)

July 31, 2025:
Assets:
Derivative financial instruments:
Commodity derivatives		$	—		$	3,570		$	—		$	3,570
Liabilities:
Derivative financial instruments:
Commodity derivatives		$	—		$	(3,654)		$	—		$	(3,654)