Note H - Derivative Financial Instruments - Gain (Loss) Recognized in Other Comprehensive Income (Details) - Hot-rolled Coil Future Contracts [Member]	3 Months Ended
	Jun. 30, 2021 USD ($)
Gain recognized in OCI	$ (32,807,460)
Gain (loss) from reclassified from AOCI	(3,515,820)
Cost of Sales [Member]
Gain (loss) from reclassified from AOCI	1,582,200
Designated as Hedging Instrument [Member]
Gain recognized in OCI	(32,807,460)
Designated as Hedging Instrument [Member] | Sales [Member]
Gain (loss) from reclassified from AOCI	$ (5,098,020)