Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31
	20 20		2019
Prime coil inventory	$	17,190,435	$	26,240,439
Non-standard coil inventory		1,550,734		2,078,008
Tubular raw material		4,888,542		4,418,750
Tubular finished goods		12,038,532		16,324,889
	$	35,668,243	$	49,062,086

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	10