Fair Value Measurements (Details) - Commodity Contract - Fair Value, measurements, recurring - USD ($)	Jan. 31, 2020	Oct. 31, 2019
Derivative instruments - commodities
In gain position	$ 78,903	$ 124,069
In loss position	(883,788)	(775,887)
Level 1
Derivative instruments - commodities
In gain position	76,025	4,538
In loss position	(99,130)	(4,375)
Level 2
Derivative instruments - commodities
In gain position	2,878	119,531
In loss position	(784,658)	(771,512)
Level 3
Derivative instruments - commodities
In gain position	0	0
In loss position	$ 0	$ 0