Note J - Segment Information - Segment Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2022
Net Sales	$ 111,860,093	$ 51,655,943	$ 423,355,592	$ 210,143,277
Operating profit (loss)	1,428,984	(5,598,263)	13,818,678	32,786,489
Interest expense	447,551	58,385	1,498,147	153,891
Other income (loss), net	826,039	1,727,134	7,349,916	(4,801,121)
EARNINGS (LOSS) BEFORE INCOME TAXES	1,807,472	(3,929,514)	19,670,447	27,831,477
Assets	203,883,283		203,883,283		$ 159,275,070
Operating Segments [Member]
Operating profit (loss)	3,951,000	(4,679,000)	21,820,000	37,448,000
Assets	197,861,000		197,861,000		139,249,000
Corporate, Non-Segment [Member]
General corporate expenses	2,522,000	920,000	8,002,000	4,662,000
Assets	6,022,000		6,022,000		20,026,000
Coil [Member]
Net Sales	100,231,001	41,795,586	372,830,186	172,814,243
Coil [Member] | Operating Segments [Member]
Net Sales	100,231,000	41,795,000	372,830,000	172,814,000
Operating profit (loss)	3,259,000	(4,032,000)	15,684,000	33,497,000
Assets	185,210,000		185,210,000		115,232,000
Tubular [Member]
Net Sales	11,629,092	9,860,357	50,525,406	37,329,034
Tubular [Member] | Operating Segments [Member]
Net Sales	11,629,000	9,861,000	50,526,000	37,329,000
Operating profit (loss)	692,000	$ (647,000)	6,136,000	$ 3,951,000
Assets	$ 12,651,000		$ 12,651,000		$ 24,017,000