Note I - Fair Value Measurements (Tables)

3 Months Ended

Jun. 30, 2020

Notes Tables

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

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Commodity futures – financial assets	$	54,000	$	—	$	—	$	54,000
Total	$	54,000	$	—	$	—	$	54,000

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