Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31
	201 8		2017
Prime coil inventory	$	6,895,756	$	8,481,605
Non-standard coil inventory		2,971,324		1,119,170
Tubular raw material		6,734,076		1,480,730
Tubular finished goods		21,438,176		23,837,045
	$	38,039,332	$	34,918,550

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