Note I - Fair Value Measurements (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

	Quoted Prices
	in Active		Significant
	Markets for		Other		Significant
	Identical		Observable		Unobservable
	Assets		Inputs		Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
Commodity futures – financial assets	$	1,440,120	$	—	$	—	$	1,440,120
Total	$	1,440,120	$	—	$	—	$	1,440,120

	Quoted Prices
	in Active		Significant
	Markets for		Other		Significant
	Identical		Observable		Unobservable
	Assets		Inputs		Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
Long-lived assets held and used (1)	$	—	$	—	$	1,771,450	$	1,771,450
Total	$	—	$	—	$	1,771,450	$	1,771,450