Note K - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Sales	$ 130,748	$ 149,692	$ 268,046	$ 311,495
Coil [Member]
Net Sales	120,527	129,722	245,724	272,599
Coil [Member] | Prime Coil [Member]
Net Sales	118,835	128,503	242,657	269,483
Coil [Member] | Secondary Coil [Member]
Net Sales	360	891	511	2,423
Coil [Member] | Customer Owned [Member]
Net Sales	1,332	328	2,556	693
Tubular [Member]
Net Sales	10,221	19,970	22,322	38,896
Tubular [Member] | Manufactured Pipe [Member]
Net Sales	$ 10,221	$ 19,970	$ 22,322	$ 38,896