Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31,
	2021		2020
Prime coil inventory	$	23,079,012	$	17,190,435
Non-standard coil inventory		1,419,055		1,550,734
Tubular raw material		2,607,197		4,888,542
Tubular finished goods		8,910,829		12,038,532
	$	36,016,093	$	35,668,243

Property, Plant and Equipment [Table Text Block]

Buildings (in years)	20
Machinery and equipment (in years)	10 to 15
Yard improvements (in years)	5 to 15
Loaders and other rolling stock (in years)	5 to 15