Note J - Segment Information - Segment Information (Details) - USD ($)	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022
Net Sales	$ 161,803,090	$ 65,916,439
Operating profit (loss)	11,889,755	13,956,615
Interest expense	429,381	23,210
Other income, net	2,767,703	312,062
EARNINGS BEFORE INCOME TAXES	14,657,458	14,268,677
Assets	262,059,616		$ 159,275,070
Operating Segments [Member]
Operating profit (loss)	15,647,000	15,856,000
Assets	257,711,000		139,249,000
Corporate, Non-Segment [Member]
General corporate expenses	3,329,000	1,876,000
Assets	4,349,000		20,026,000
Coil [Member]
Net Sales	142,876,972	52,694,730
Coil [Member] | Operating Segments [Member]
Net Sales	142,877,000	52,695,000
Operating profit (loss)	13,543,000	13,256,000
Assets	233,397,000		115,232,000
Tubular [Member]
Net Sales	18,926,118	13,221,709
Tubular [Member] | Operating Segments [Member]
Net Sales	18,926,000	13,221,000
Operating profit (loss)	2,104,000	$ 2,600,000
Assets	$ 24,314,000		$ 24,017,000