Note I - Fair Value Measurements - Recurring Fair Value Measurements (Details) - Fair Value, Recurring [Member] - USD ($)	Jun. 30, 2021	Mar. 31, 2021
Commodity futures – financial liabilities, net	$ (26,967,380)	$ (7,407,400)
Total	(26,967,380)	(7,407,400)
Fair Value, Inputs, Level 1 [Member]
Total	(26,967,380)	(7,407,400)
Fair Value, Inputs, Level 1 [Member] | Commodity Contract [Member]
Commodity futures – financial liabilities, net	(26,967,380)	(7,407,400)
Fair Value, Inputs, Level 2 [Member]
Total	0	0
Fair Value, Inputs, Level 2 [Member] | Commodity Contract [Member]
Commodity futures – financial liabilities, net	0	0
Fair Value, Inputs, Level 3 [Member]
Total	0	0
Fair Value, Inputs, Level 3 [Member] | Commodity Contract [Member]
Commodity futures – financial liabilities, net	$ 0	$ 0