Fair value measurements (Tables)

9 Months Ended

Apr. 30, 2024

Fair value measurements

Schedule of assets and liabilities fair value hierarchy

	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
April 30, 2024:
Assets:
Derivative financial instruments:
Commodity derivatives	$	—	$	5,631	$	—	$	5,631
Liabilities:
Derivative financial instruments:
Commodity derivatives	$	—	$	(4,589)	$	—	$	(4,589)
July 31, 2023:
Assets:
Derivative financial instruments:
Commodity derivatives	$	—	$	12,165	$	—	$	12,165
Liabilities:
Derivative financial instruments:
Commodity derivatives	$	—	$	(11,082)	$	—	$	(11,082)