Note H - Derivative Financial Instruments - Gain (Loss) Recognized in Other Comprehensive Income (Details) - USD ($)	3 Months Ended						9 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2022	Dec. 31, 2021
Pre-tax gain (loss) recognized in OCI	$ 22,100			$ 3,473,300			$ 9,445,840	$ (6,609,540)
Sales	111,860,093			51,655,943			423,355,592	210,143,277
Cost of goods sold	105,730,259			55,259,964			393,875,438	166,722,381
Total	1,375,893	$ 2,470,908	$ 11,184,374	(2,961,833)	$ 13,177,614	$ 11,311,797	15,031,175	21,527,578
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Sales	(860,620)
Total				(14,716,860)			(2,977,160)	(12,317,960)
Hot-rolled Coil Future Contracts [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Sales	(860,620)			(14,766,060)			(2,977,160)	(22,950,860)
Cost of goods sold				49,200				10,632,900
Hot-rolled Coil Future Contracts [Member] | Designated as Hedging Instrument [Member]
Pre-tax gain (loss) recognized in OCI	$ 22,100			$ 3,473,300			$ 9,445,840	$ (6,609,540)