Note J - Segment Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2023
Net Sales	$ 115,973	$ 111,860	$ 384,019	$ 423,356
Operating profit (loss)	6,173	1,429	17,585	13,818
Gain (loss) on economic hedges of risk	(4,126)	822	706	7,326
Interest expense	(790)	(448)	(2,135)	(1,498)
Other income	1	4	17	24
EARNINGS BEFORE INCOME TAXES	1,258	1,807	16,173	19,670
Assets	228,955		228,955		$ 199,312
Operating Segments [Member]
Operating profit (loss)	8,578	3,951	25,814	21,820
Assets	223,319		223,319		195,638
Corporate, Non-Segment [Member]
General corporate expenses	(2,405)	(2,522)	(8,229)	(8,002)
Assets	5,636		5,636		3,674
Coil [Member]
Net Sales	106,424	100,231	352,148	372,830
Coil [Member] | Operating Segments [Member]
Net Sales	106,424	100,231	352,148	372,830
Operating profit (loss)	8,694	3,259	23,650	15,684
Assets	202,900		202,900		179,780
Tubular [Member]
Net Sales	9,549	11,629	31,871	50,526
Tubular [Member] | Operating Segments [Member]
Net Sales	9,549	11,629	31,871	50,526
Operating profit (loss)	(116)	$ 692	2,164	$ 6,136
Assets	$ 20,419		$ 20,419		$ 15,858