Note H - Derivative Financial Instruments - Gain (Loss) Recognized in Other Comprehensive Income (Details) - USD ($)	3 Months Ended				6 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pre-tax gain (loss) recognized in OCI	$ 590,380		$ 1,557,820		$ 9,423,740	$ (20,013,560)
Sales	149,692,409		92,570,895		311,495,499	158,487,334
Cost of goods sold	145,014,017		62,875,913		288,145,179	111,462,417
Total	2,470,908	$ 11,184,374	13,177,614	$ 11,311,797	13,655,282	24,489,411
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Sales	(1,490,360)
Total			5,914,720		(2,116,540)	2,398,900
Hot-rolled Coil Future Contracts [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Sales	(1,490,360)		(3,086,780)		(2,116,540)	(8,184,800)
Cost of goods sold			9,001,500			10,583,700
Hot-rolled Coil Future Contracts [Member] | Designated as Hedging Instrument [Member]
Pre-tax gain (loss) recognized in OCI	$ 590,380		$ 1,557,820		$ 9,423,740	$ (20,013,560)