Note J - Segment Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023
Net Sales	$ 137,298	$ 161,803
Operating profit (loss)	10,357	12,319
Gain on economic hedges of risk	430	2,754
Interest expense	(540)	(429)
Other income	6	13
EARNINGS BEFORE INCOME TAXES	10,253	14,657
Assets	211,402		$ 199,312
Operating Segments [Member]
Operating profit (loss)	14,078	15,647
Assets	205,466		195,638
Corporate, Non-Segment [Member]
General corporate expenses	(3,721)	(3,328)
Assets	5,936		3,674
Coil [Member]
Net Sales	125,197	142,877
Coil [Member] | Operating Segments [Member]
Net Sales	125,197	142,877
Operating profit (loss)	11,814	13,543
Assets	185,303		179,780
Tubular [Member]
Net Sales	12,101	18,926
Tubular [Member] | Operating Segments [Member]
Net Sales	12,101	18,926
Operating profit (loss)	2,264	$ 2,104
Assets	$ 20,163		$ 15,858